Async Scene Deprecation
The Async Scene is something that has been around for a while and was used to store Apex Destruction bodies. Those bodies would run up to a frame behind and the engine would get the results when the next frame came around.
The problem with this is that there is a lot of code that handles just the management (for example, if Async do this, if not Async do that) and if you have a lot of bodies in the destruction scene, this could impact your game thread. Additionally, bodies in the Async Scene could not interact with gameplay or other bodies from the sync scene. Removing the Async Scene means all bodies can interact with each other and with gameplay.
With the Async Scene being depreciated, it doesn’t mean that destruction won’t work, it just means the Async Scene part of it is no longer supported. Destruction will work perfectly fine, however, it will now work as part of the main physics scene.