The immediately noticeable improvement with wayland is with respect to screen tearing, especially in multi-monitor rotated configurations. Screen tearing has always been an issue on x11, and while intel/amd drivers do a decent job in basic cases, things that don't work will likely never work given that x11 is mostly deprecated.
Screen tearing has not been an issue on X11 for like... a decade? Granted, that's after development on Wayland started.
Also I just don't get this obsession with screen tearing. I've experienced it on occasion in other context and I... just kinda don't care about it? Certainly if you're a video editing/creating/whatever professional, it actually matters for your job, but otherwise it's just cosmetic, and often hardly noticeable at all.
This is just one very easy to replicate example. There are a bunch of other seemingly simple tasks that lead to some rather hideous tearing in X.
mpv has a whole FAQ section about it:
https://github.com/mpv-player/mpv/wiki/FAQ#tearing
Some of the solutions presented there are not mpv-specific, and some of them may even actually help.
A nice made-up issue but it's made up.
Famously stable, reliable, and uncomplicated.
Option "metamodes" "nvidia-auto-select +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"
Option "TearFree" "On"
$ xrandr --output $output --set TearFree on
No bloody idea, nouveau is broken. Sorry to break it to you or you're either using NVIDIA binary drivers or buy a different GPU.
The issue does not exist. Period. If you have troubles enabling these options, I'm sorry for you. Linux in 2022 still requires to choose your HW wisely. If you don't like it/have a different PoV, it's not my problem, it is the status quo.
(WW) modeset(0): Option "TearFree" is not usedYour report is not widely shared on the Internet either. Arch Wiki, unix.stackexchange.com, r/Linux, and others - none of them confirm it either.
I'm almost sure it's down to your particular HW configuration.