[Bug]: Missing clarification for unstable_batchedUpdates behavior

Summary

The documentation does not clearly explain the current behavior of unstable_batchedUpdates, which can be misleading for developers.

Page

https://react.dev/reference/react-dom

Details

While reviewing the React DOM source code, I noticed that unstable_batchedUpdates may behave as a no-op in modern React configurations (outside of legacy mode). However, this behavior is not clearly explained in the documentation.

This can lead developers to assume that the function still provides batching behavior, when in practice it may not affect updates in modern setups.

Suggested improvement:

• Clarify when unstable_batchedUpdates is effective
• Indicate that it may behave as a no-op in modern React
• Provide guidance on whether it is still recommended for use

This would help prevent confusion and improve developer understanding of the API.

Start with the react.dev/reference/react-dom page named in the issue and review the current unstable_batchedUpdates documentation against its modern and legacy-mode behavior. Done means the page explains when batching is effective, notes the possible no-op behavior, and gives clear guidance on whether developers should use it.