[worble]

I reckon they're thinking long term here though, if they don't change it now then likely the only time they could change it is when a theoretical Godot 5.0 comes out in who knows how many years.

It sounds like it's got bugs that need fixing either way, so at least for their own engine they're not reliant on anyone else to get those fixes out (or have to use hacky workarounds as would most likely be the actual fix).

[runevault]

From everything I heard the existing physics engine was already buggy/hard to work with, which is harder to fix because either they had to fork it and then maintain compat themselves or ensure all their changes got accepted upstream. At some point it can easily make sense to just go your own way, and I can't fault them for deciding to do so.