As comment in another post said - this is for modules only. There’s still a ton of binary fluff that is the main cause of issues and that is not getting open sourced.

Both of them have their own issues, but historically, Nvidia have been considerably worse, because they not only required a proprietary driver, but also adamantly refused to support certain features, crippling the functionality of a lot of compositors.

Today, I’m having zero issues with an Nvidia card, on Kwin/Wayland. Everything that runs in native Wayland runs flawlessly. Games through Xwayland run great too, now that explicit sync is actually there.

Worth noting that I don’t have a VRR display, and don’t have a card that supports frame generation. The latter just is not implemented at all, and the I’ve heard there are issues with the former