yoshiki — 2022-10-16 via discord 
As for the collisionEventHandlers, yes, the worldcore version may be obsoleted. The one in Microverse https://github.com/croquet/microverse/blob/main/src/physics.js has some updated support. But as you can see in the latter, Worldcore does not require you to use Rapier through Worldcore's RapierPhysicsManager. You can copy the base implementation (the RapierPhysics.js) and modify a few things and you have your own physics bindings.