Well folks, it’s the beginning of a new era: after nearly three decades of KDE desktop environments running on X11, the future KDE Plasma 6.8 release will be Wayland-exclusive! Support for X11 applications will be fully entrusted to Xwayland, and the Plasma X11 session will no longer be included.
I’ve been using Plasma on Wayland with an RTX 3070ti for a couple years without any issue (excluding the one program I mentioned in another comment here)
Running arch Linux KDE on Wayland with a 4090. Not a single issue graphically in the last year.