Since physics has been open sourced, can we expect a physx integration with godot that does not break the existing code base?
Possibly, should anyone ever choose to write and contribute the integration. We got Bullet because a developer appeared who was going to do it for themselves anyways. That's how this typically goes in open source projects.
Happy to hear that there is a possibility for physx integration for godot in future
Maybe this video about Nvidia Flex integration is helpful?
Does Flex support mobile gpus?
Looking at Nvidia’s page for Flex, it appears that only Windows and Linux are currently supported.