diff --git a/winit-core/src/as_any.rs b/winit-core/src/casting.rs
similarity index 60%
rename from winit-core/src/as_any.rs
rename to winit-core/src/casting.rs
index 5274bbe7b..e3bdd7653 100644
--- a/winit-core/src/as_any.rs
+++ b/winit-core/src/casting.rs
@@ -1,36 +1,3 @@
-use std::any::Any;
-
-// NOTE: This is `pub`, but isn't actually exposed outside the crate.
-// NOTE: Marked as `#[doc(hidden)]` and underscored, because they can be quite difficult to use
-// correctly, see discussion in #4160.
-// FIXME: Remove and replace with a coercion once rust-lang/rust#65991 is in MSRV (1.86).
-#[doc(hidden)]
-pub trait AsAny: Any {
-    #[doc(hidden)]
-    fn __as_any(&self) -> &dyn Any;
-    #[doc(hidden)]
-    fn __as_any_mut(&mut self) -> &mut dyn Any;
-    #[doc(hidden)]
-    fn __into_any(self: Box<Self>) -> Box<dyn Any>;
-}
-
-impl<T: Any> AsAny for T {
-    #[inline(always)]
-    fn __as_any(&self) -> &dyn Any {
-        self
-    }
-
-    #[inline(always)]
-    fn __as_any_mut(&mut self) -> &mut dyn Any {
-        self
-    }
-
-    #[inline(always)]
-    fn __into_any(self: Box<Self>) -> Box<dyn Any> {
-        self
-    }
-}
-
 #[macro_export]
 macro_rules! impl_dyn_casting {
     ($trait:ident) => {
@@ -39,7 +6,7 @@ macro_rules! impl_dyn_casting {
             ///
             /// Returns `None` if the object was not from that backend.
             pub fn cast_ref<T: $trait>(&self) -> Option<&T> {
-                let this: &dyn std::any::Any = self.__as_any();
+                let this: &dyn std::any::Any = self;
                 this.downcast_ref::<T>()
             }
 
@@ -47,7 +14,7 @@ macro_rules! impl_dyn_casting {
             ///
             /// Returns `None` if the object was not from that backend.
             pub fn cast_mut<T: $trait>(&mut self) -> Option<&mut T> {
-                let this: &mut dyn std::any::Any = self.__as_any_mut();
+                let this: &mut dyn std::any::Any = self;
                 this.downcast_mut::<T>()
             }
 
@@ -56,7 +23,7 @@ macro_rules! impl_dyn_casting {
             /// Returns `Err` with `self` if the object was not from that backend.
             pub fn cast<T: $trait>(self: Box<Self>) -> Result<Box<T>, Box<Self>> {
                 if self.cast_ref::<T>().is_some() {
-                    let this: Box<dyn std::any::Any> = self.__into_any();
+                    let this: Box<dyn std::any::Any> = self;
                     // Unwrap is okay, we just checked the type of `self` is `T`.
                     Ok(this.downcast::<T>().unwrap())
                 } else {
@@ -71,10 +38,10 @@ pub use impl_dyn_casting;
 
 #[cfg(test)]
 mod tests {
-    use super::AsAny;
+    use std::any::Any;
 
     struct Foo;
-    trait FooTrait: AsAny {}
+    trait FooTrait: Any {}
     impl FooTrait for Foo {}
     impl_dyn_casting!(FooTrait);
 
diff --git a/winit-core/src/cursor.rs b/winit-core/src/cursor.rs
index c411e0d3e..408c9e86d 100644
--- a/winit-core/src/cursor.rs
+++ b/winit-core/src/cursor.rs
@@ -1,4 +1,5 @@
 use core::fmt;
+use std::any::Any;
 use std::error::Error;
 use std::hash::Hash;
 use std::ops::Deref;
@@ -8,8 +9,6 @@ use std::time::Duration;
 #[doc(inline)]
 pub use cursor_icon::CursorIcon;
 
-use crate::as_any::AsAny;
-
 /// The maximum width and height for a cursor when using [`CustomCursorSource::from_rgba`].
 pub const MAX_CURSOR_SIZE: u16 = 2048;
 
@@ -79,7 +78,7 @@ impl From<CustomCursor> for Cursor {
 #[derive(Clone, Debug)]
 pub struct CustomCursor(pub Arc<dyn CustomCursorProvider>);
 
-pub trait CustomCursorProvider: AsAny + fmt::Debug + Send + Sync {
+pub trait CustomCursorProvider: Any + fmt::Debug + Send + Sync {
     /// Whether a cursor was backed by animation.
     fn is_animated(&self) -> bool;
 }
diff --git a/winit-core/src/data_transfer.rs b/winit-core/src/data_transfer.rs
index c70be7946..6daf18fea 100644
--- a/winit-core/src/data_transfer.rs
+++ b/winit-core/src/data_transfer.rs
@@ -99,12 +99,11 @@
 
 #![warn(missing_docs)]
 
+use std::any::Any;
 use std::ops::ControlFlow;
 use std::path::{Path, PathBuf};
 use std::{fmt, io};
 
-use crate::as_any::AsAny;
-
 /// Unique identifier for a data transfer.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DataTransferId(i64);
@@ -194,7 +193,7 @@ impl TypeHint {
 ///
 /// [`hint`](TransferType::hint) can be called to get the type in
 /// a cross-platform format (see [`TypeHint`])
-pub trait TransferType: AsAny + fmt::Debug {
+pub trait TransferType: Any + fmt::Debug {
     /// Get the cross-platform representation of this type.
     ///
     /// If this returns `None`, then this is a platform-dependent type that has no cross-platform
@@ -251,7 +250,7 @@ fn default_try_as_file_paths<T: TypedData + ?Sized>(_: &T) -> io::Result<Vec<Pat
 /// error with [`io::ErrorKind::Deadlock`]. For now, the only way to access the data is via blocking
 /// on the event loop, so simply retrying the next time an event is received that references the
 /// data transfer should be enough to ensure that the data is accessible.
-pub trait TypedData: AsAny + fmt::Debug + Send + Sync {
+pub trait TypedData: Any + fmt::Debug + Send + Sync {
     /// The type of this `TypedData`.
     fn type_(&self) -> &dyn TransferType;
 
@@ -329,7 +328,7 @@ impl_dyn_casting!(TypedData);
 /// Metadata about a data transfer. This does not allow actually receiving data, as that is an
 /// asynchronous operation. To fetch the data from the source application, see
 /// [`ActiveEventLoop::fetch_data_transfer`](crate::event_loop::ActiveEventLoop::fetch_data_transfer).
-pub trait DataTransfer: AsAny + fmt::Debug {
+pub trait DataTransfer: Any + fmt::Debug {
     /// Iterate over each type advertized by this `DataTransfer`. This is just a minor optimization,
     /// in most cases you should probably use [`has_type`](DataTransfer::has_type) or
     /// [`available_types`](DataTransfer::available_types).
diff --git a/winit-core/src/event_loop/mod.rs b/winit-core/src/event_loop/mod.rs
index 38246a85f..4d07b12ee 100644
--- a/winit-core/src/event_loop/mod.rs
+++ b/winit-core/src/event_loop/mod.rs
@@ -3,6 +3,7 @@ pub mod pump_events;
 pub mod register;
 pub mod run_on_demand;
 
+use std::any::Any;
 use std::fmt::{self, Debug};
 use std::sync::Arc;
 use std::sync::atomic::{AtomicUsize, Ordering};
@@ -12,7 +13,6 @@ use rwh_06::{DisplayHandle, HandleError, HasDisplayHandle};
 
 use crate::Instant;
 use crate::application::ApplicationHandler;
-use crate::as_any::AsAny;
 use crate::cursor::{CustomCursor, CustomCursorSource};
 use crate::data_transfer::{DataTransfer, DataTransferId, DataTransferSend, TransferType};
 use crate::error::{EventLoopError, NotSupportedError, RequestError};
@@ -109,7 +109,7 @@ pub trait EventLoopProvider: fmt::Debug {
     ) -> Result<CustomCursor, RequestError>;
 }
 
-pub trait ActiveEventLoop: AsAny + fmt::Debug {
+pub trait ActiveEventLoop: Any + fmt::Debug {
     /// Creates an [`EventLoopProxy`] that can be used to dispatch user events
     /// to the main event loop, possibly from another thread.
     fn create_proxy(&self) -> EventLoopProxy;
diff --git a/winit-core/src/icon.rs b/winit-core/src/icon.rs
index 1d943fc1d..49f807d0d 100644
--- a/winit-core/src/icon.rs
+++ b/winit-core/src/icon.rs
@@ -1,10 +1,9 @@
+use std::any::Any;
 use std::error::Error;
 use std::ops::Deref;
 use std::sync::Arc;
 use std::{fmt, io, mem};
 
-use crate::as_any::AsAny;
-
 pub(crate) const PIXEL_SIZE: usize = mem::size_of::<u32>();
 
 /// An icon used for the window titlebar, taskbar, etc.
@@ -12,7 +11,7 @@ pub(crate) const PIXEL_SIZE: usize = mem::size_of::<u32>();
 pub struct Icon(pub Arc<dyn IconProvider>);
 
 // TODO remove that once split.
-pub trait IconProvider: AsAny + fmt::Debug + Send + Sync {}
+pub trait IconProvider: Any + fmt::Debug + Send + Sync {}
 
 impl Deref for Icon {
     type Target = dyn IconProvider;
diff --git a/winit-core/src/lib.rs b/winit-core/src/lib.rs
index 6ea1e2535..508cd0f0d 100644
--- a/winit-core/src/lib.rs
+++ b/winit-core/src/lib.rs
@@ -14,7 +14,7 @@
 #![warn(clippy::exhaustive_enums)]
 
 #[macro_use]
-pub mod as_any;
+pub mod casting;
 pub mod cursor;
 #[macro_use]
 pub mod error;
diff --git a/winit-core/src/monitor.rs b/winit-core/src/monitor.rs
index b100710c7..4c5750b61 100644
--- a/winit-core/src/monitor.rs
+++ b/winit-core/src/monitor.rs
@@ -5,6 +5,7 @@
 //! methods, which return an iterator of [`MonitorHandle`]:
 //! - [`ActiveEventLoop::available_monitors`][crate::event_loop::ActiveEventLoop::available_monitors].
 //! - [`Window::available_monitors`][crate::window::Window::available_monitors].
+use std::any::Any;
 use std::borrow::Cow;
 use std::fmt;
 use std::num::{NonZeroU16, NonZeroU32};
@@ -13,8 +14,6 @@ use std::sync::Arc;
 
 use dpi::{PhysicalPosition, PhysicalSize};
 
-use crate::as_any::AsAny;
-
 /// Handle to a monitor.
 ///
 /// Allows you to retrieve basic information and metadata about a monitor.
@@ -54,7 +53,7 @@ impl PartialEq for MonitorHandle {
 impl Eq for MonitorHandle {}
 
 /// Provider of the [`MonitorHandle`].
-pub trait MonitorHandleProvider: AsAny + fmt::Debug + Send + Sync {
+pub trait MonitorHandleProvider: Any + fmt::Debug + Send + Sync {
     /// Identifier for this monitor.
     ///
     /// The representation of this modifier is not guaranteed and should be used only to compare
diff --git a/winit-core/src/window.rs b/winit-core/src/window.rs
index 0bda71233..2e0247d87 100644
--- a/winit-core/src/window.rs
+++ b/winit-core/src/window.rs
@@ -1,4 +1,5 @@
 //! The [`Window`] trait and associated types.
+use std::any::Any;
 use std::fmt;
 
 use bitflags::bitflags;
@@ -9,7 +10,6 @@ use dpi::{
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
-use crate::as_any::AsAny;
 use crate::cursor::Cursor;
 use crate::error::RequestError;
 use crate::icon::Icon;
@@ -513,7 +513,7 @@ pub(crate) struct SendSyncRawWindowHandle(pub(crate) rwh_06::RawWindowHandle);
 unsafe impl Send for SendSyncRawWindowHandle {}
 unsafe impl Sync for SendSyncRawWindowHandle {}
 
-pub trait PlatformWindowAttributes: AsAny + std::fmt::Debug + Send + Sync {
+pub trait PlatformWindowAttributes: Any + std::fmt::Debug + Send + Sync {
     fn box_clone(&self) -> Box<dyn PlatformWindowAttributes>;
 }
 
@@ -537,7 +537,7 @@ impl_dyn_casting!(PlatformWindowAttributes);
 ///
 /// **Web:** The [`Window`], which is represented by a `HTMLElementCanvas`, can
 /// not be closed by dropping the [`Window`].
-pub trait Window: AsAny + Send + Sync + fmt::Debug {
+pub trait Window: Any + Send + Sync + fmt::Debug {
     /// Returns the window type of this window
     fn window_type(&self) -> WindowType;