Or for gods sake.
Show me all those games made with unreal where you spawn 600 balls in single place ?
That’s purely YouTube measuring contest, not an common game development use case.
Chaos is optimized for what is commonly used in games and more importantly for what is used in Fortnite. Scene queries, Cloth, Vehicles.
It will also first support use cases that are actually useful (like networked physics) or 64 bit precision.