I keep trying it (coming from EXWM) but I get lots of lag, stutters, and poor fractional scaling. I'm not sure how much of that is "GTK under wayland", Emacs's PGTK build (known to have lag/rendering issues), AMD kernel drivers (?), or EWM itself; but it's not yet a replacement for EXWM in my experience.
Lagging is super annoying, and regretfully it comes mostly from very slow pgtk cairo implementation.
I'm getting the Skia branch to a usable shape this week. A bit too early to say, but the approach looks promising. Running it for almost a week with a 4k 120hz external monitor, no issues noticed so far.
"Writing a Wayland compositor from scratch is a staggering amount of work..."
I switched to Wayland and sway about 2 years ago and it hasn't been bad, but this is the thing that makes me most sad about Wayland. X has so many different window manager options, it's like, an embarrassment of wealth. Wayland has like, 3 "finished" ones (if sway even counts).
it is sad, X11 had a suite of tools like xrandr that worked regardless of your wm/compositor but now with Wayland these tools are compositor-specific (or have to agree to a standard).