I mostly use AMD and have been using Wayland since GNOME 40 without any problems, loving the consistently perfect frames and fantastic scaling (with Wayland programs, but nowadays I use nearly no X11-only programs).
I tried Nvidia with Wayland a few times and it always was a clusterfuck. I remember when Nvidia just released GBM support on their drivers I actually compiled my own Mutter to try Wayland because there was a bug with the hardware cursor that overflowed the GPU memory. I even tried eglstreams a few times with the Nvidia-developed GNOME backend. No matter what, I always had problems with invisible programs, programs leaving trails like the cards falling in Windows 98 Solitaire when moving the window, slow programs, blurry programs, unresponsive programs, etc.
Today I tried again Nvidia with GNOME 43/Wayland on Debian 12 and also experienced lots of the same issues as I always had. I then moved to Sid with GNOME 44 and was pleasantly surprised to see nearly all my issues just go away. Have not seen any invisible programs, nor any trails behind windows when moved. I have seen abnormally slow programs though, the GNOME terminal seems to struggle when scrolling fullscreen, whereas my laptop with and AMD APU works perfectly.
Currently happily using GNOME 44 with Wayland on Nvidia, never thought I would get to say this. I’m hyped for GNOME 45 to drop in Sid!
I have a Nvidia GPU and find the Plasma / Xorg experience to be fine. Plasma / Wayland is shocking though.
It is completely usable but this “lag” or “dragging sensation” feels disgusting at least on my PC.
Is that on X11 or Wayland?
When my main PC had Nvidia I was desperate to move from Xorg to Wayland because Xorg was laggy like that video you showed while Wayland behaved perfectly.
I think that only happens on Xorg if you have different monitors though.
It is X11, Wayland in my case works fine but I have the problem that you mentioned, that the windows and mouse has a ghosting effect
And no, I only have one monitor.
I honestly hate Nvidia, I hope Plasma 6 fixes things for me as for you Gnome 44 fixes its problems.
I can’t say that I’ve noticed any lag but I haven’t been looking for it.