I mention why USD does not work in the proposal:

USD is not ‘just a 3d format’. Its scope is far bigger and more comparable to an entire game-engine project rather than a single asset. It can make use of FBX files, and it could make use of this proposed format in the same way. USD does not replace FBX, or any other file format like that, and it’s very complex. Godot doesn’t support USD.

Last month, I tried to get a model from Blender 4.2 to Unity 2022 in USD. It omitted the main armature. I quadruple checked all settings^^ USD may be very nice for VFX, gamedev is fundamentally different. I need ‘just a fileformat’. If USD just worked across the board, I would have likely just used that. It is very complex and appropriately hard to implement. In don’t fault Godot at all for not supporting it.