worried
Worried about Wayland for myself anyway. Just recently "upgraded" (installed to another partition) to Mint 22 from Mint 20 a couple of weeks ago. My biggest issue was whether or not I would be able to get brightside(http://archive.ubuntu.com/ubuntu/pool/universe/b/brightside/) to build and run. Fortunately after not too much effort I was able to compile it and it's dependencies(about 17 of them, had to hack some things up to get some to build), brightside hasn't seen an updated since 2005(several other dependencies date back to early 2010s), and last officially released with Ubuntu 16 I think. Fortunately the app itself is super simple though it does depend on some more complex libraries.
brightside provides the MATE desktop (or Gnome v1 before that) the ability to flip virtual desktops when your mouse moves to the edge of the screen(up/down/left/right), something I have used as a core part of my workflow on Linux going back to the late 90s/early 00s with AfterStep. I use a total of 24 virtual desktops in a 6x4 grid.
Last time I checked, which was years ago at this point(when I first upgraded to Mint 20 from 17) I was unable to find newer software that provided this functionality for MATE. It seems the latest MATE includes Wayland support(Mint 22 ships with MATE 1.26 from 2021) , but worry/expecting brightside won't work with Wayland, maybe there is another software package now that offers this edge flipping functionality perhaps I am the last person in the world to use it or something.
My stopgap idea in the meantime once MATE 22 goes EOL(2029?) if there is no X11 anymore or something is get Ubuntu Pro, which looks like is free for personal use, which would give me another ~4-5 years of core updates anyway, since Mint bases most of their software off of Ubuntu's repos (I already maintain my browser updates completely manually with Firefox ESR and MS Edge).
Wayland has had very worried me for years because of this, I wasn't sure if my next jump from Mint 20 would have X11 anymore or not so was relieved that it was still there. By the time I'm done with Mint 22(which won't be till it's past EOL, excluding time spent with Ubuntu pro updates), it'll be a solid 30+ years of depending on edge flipping for my day to day workflow(and about 25 years of using a GNOME v1 style desktop UI), and obviously I don't want to try to force a drastic change in a workflow that has worked so well for so long for me.