AMD began the process of open-sourcing their Linux graphics drivers more than 20 years ago. At that time, they had no working open-source drivers yet; they'd only just released some hardware documentation. I told myself then that if they came through and delivered open-source drivers, I was an AMD customer for life. I've more or less held to it. I don't remember the last time I considered NVIDIA an option.

NVIDIA has apparently open-sourced the kernel drivers for their most recent couple generations of graphics cards. That's great! But they have a hell of a lot of catching up to do. Their kernel drivers aren't in the mainline Linux kernel. Their userspace drivers are proprietary, whereas AMD's are open-source. AMD's kernel drivers are built into Linux and their userspace drivers are built into Mesa.

That history of greater compatibility matters in its own right: all of the developers of Linux desktop environments, window managers, and compositors have been running AMD or Intel GPUs almost exclusively for many years.

If "voting with your wallet" means anything to you, or you want things to "just work", AMD is the clear choice and it's not even close.

If you already have NVIDIA hardware, by all means, go ahead. It's doable. But AMD is a way more rational choice on Linux for most users.