TLDR: XFCE and Cinnamon devs are begging beginning to work on Wayland support.
It’s extremely widely used. It’s been the Gnome default (unless you used Nvidia) since 2016 or something.
Even in Debian on Gnome it’s been the default since 2019.
On KDE a bunch of distros use it too.
Wayland is the future. But for most it’s already the present too.
Nvidia has been decent on Wayland from my experience. Then again my experience has just been 5 days, but it feels snappier than X11 I kinda like the feel.
Nvidia on Wayland is usable but not much more than that. There are issues with Xwayland windows flickering and some general instabilities and glitches. But it works for the most part, and the 545 drivers supposedly fix lots of missing features and bugs for Wayland.
Yeah xwayland does has a lot of issues, with fullscreen wine games for example all you see is constantly zooming background instead of the game. But the finger gestures and the overall smoothness makes it worth it for me, even tho I play my games in a window. Hopefully 545 fixes that.