Earlier quoted context omitted.
They do need to rework their development processes. It’s worth noting though that there are two (kinda three) different drivers with very different quality and different teams behind them. There’s the binary driver, on windows and the fglrx driver for Linux, that contains the full OpenGL stack and all the proprietary stuff. That’s been maintained and extended since the ATI days by a team primarily based in Markham. I…
I believe your info is a bit out-of-date. FGLRX hasn't been maintained or actively developed for a quite a while and unless you're using super-duper-ancient HW no one actually uses it anymore. AMDGPU is the the current Linux driver, combined with Mesa, and certainly is not 2D only.
Isn't the concept of 3D APIs limited to stuff like Mesa, with the kernel space AMDGPU driver providing only the primitives on which the API can then be built? I could be wrong, but that's how I understood it.
I things like Fglrx, the OpenGL stack was part of the driver proper IIRC.
But granted, I haven't heard of or seen FGLRX in literally more than a decade, and describing AMDGPU as 2D only is misleading or pedantic.