linux’s amdgpu is far better than the nvidia-driver.
Source: Was burned by ATI, Matrox, 3dlabs before finallly coughing up the cash for Nvidia.
I had a Riva TNT 2 card. The only "accelerated" thing it could do in X was DGA (direct graphics access). Switched to Ati and never looked back. Of course you could use the proprietary driver. If you had enough time to solve instalation problems and didn't mind frequent crashes.
nvidia being the only viable solution for 3d on linux is a bit of an exaggeration imo (source: i did it for 5 years), but that was a long time ago: we have amdgpu, which is far superior to nvidia’s closed source driver.
Compared to the official Nvidia driver.
> If you had enough time to solve instalation problems and didn't mind frequent crashes
I used Nvidia GPUs from ~2001 to ~2018 on various machines with various GPUs and i never had any such issues on Linux. I always used the official driver installer and it worked perfectly fine.
The MGA Millennium had unprecedented image quality, and its RAMDAC was in a league of its own. The G200 had the best 3D image quality when it was released, but it was really slow and somewhat buggy outside of Direct3D where it shined. However, even with my significant discount and my fanboyism, when the G400 was released, I defected to NVIDIA since its relative performance was abysmal.
fglrx has always been a terrible experience indeed, so AMD was no match for nvidia closed source driver.
So, once upon a time (I'd say 2000-2015) the best Linux driver for discrete GPUs was nVidia closed source one. Nowadays it's the amd open source one. Intel has always been good, but doesn't provide the right amount of power.