I've been using Wayland KDE on my gaming machine recently, it somehow made my cursor movement stutter. Switching to KDE X11 or Gnome Wayland solved the issue.
I hope they address this kind of thing prior to making it a default.
I use Wayland KDE but have shortcuts for Steam to launch within Gamescope [].
# normal steam with experimental HDR enabled, native resolution for my laptop and 165hz refresh rate.
alias steam 'steam-run gamescope -f --hdr-enabled -e -W 2560 -H 1440 -r 165 -- steam'
# full screen gamepad ui
alias steam_gamepadui 'steam-run gamescope -f --hdr-enabled -e -W 2560 -H 1440 -r 165 -- steam -gamepadui'
Computer is Asus G513qy, a a full AMD laptop with discrete graphics. Janky thermal design, no thunderbolt... so more like a stationary desktop. Wouldn't buy something like this again but for now it does the job and runs great with any modern distro.
I've been using Wayland + KDE (currently Plasma 5.27.8) for a very long time now on my machine with an Nvidia GPU (first a 1080TI, then a 4090). There are annoying bugs, but they're not show stoppers. I'm not someone who whines about problems like these, especially because I'm at the forefront of the Linux desktop, on a known-bad combination, so there are bound to be bugs :P
For example, a persistent bug that hasn't gone away in all this time is flaky wake from sleep. Sometimes, one of my monitors breaks in such a way that it drops down to 640x480 res and can't be changed back unless I do a list of different rituals. Another bug is that KDE's "Night Color" feature doesn't work, and whenever it turns on it completely freezes the display every few minutes (although unfreezing it is just a matter of pressing the Meta key, so it's not a big deal). I keep sleep and Night Color on, even though they're broken in the hopes that I'll one day wake up to an update that fixed them. I'm 99% sure those are Nvidia driver bugs, and Nvidia has been working to improve their Wayland support recently (for example, there's an upcoming Night Light fix that I'm excited for: https://www.omgubuntu.co.uk/2023/10/gnome-night-light-nvidia...). Being able to follow progress like this is fun for me.
I'm sure there are some other issues that I'm not remembering, but overall the desktop is completely 100% usable and reliable (for both working and gaming). My only other machine is a laptop, and that too is running KDE+Wayland (though no Nvidia). I have not switched back to X11 once in the months (year?) since I switched to Wayland, and have not missed anything.
EDIT: also, I should mention that I'm on Fedora Kinoite. I feel like a lot of problems people have with KDE/Wayland/Nvidia comes down to bad configuration somewhere. If you're on a similar machine, I recommend you try switching to Kinoite since it's designed to just work out of the box, and is pretty much impossible to break.
All of that work for me on AMDGPU, so likely not a KDE bug.
Same here I have been using wayland with sway and KDE depending on the machines (some with intel gpu, but no nvidia) for a few years now and nothing to complain about (fedora, arch and ubuntu)
This might very well be a nvidia problem, their driver comes with its own suspend functions which replaces your default one during install (it usually tells you on the dnf install screen)
[] https://github.com/ValveSoftware/gamescope