BG3 ran fine, no noticeable differences. Appeared to close cleanly, but left a generic titled "window" that was minimized in the tray. Didn't appear to have any processes attached to it, exiting steam didn't close it. Realized that's because it wasn't there.. my tray had stopped updating. Ended up having to restart.
DCUO, no noticeable issues.
SWTOR Launcher took a bit to draw, box was there but it was black. No noticeable gameplay issues. Then it would not close. Had to ctrl+alt+esc kill it.
ESO, no noticeable issues. Had trouble with re-drawing the launcher after game close.
Saints Row - no issues.
Rift - no issues.
Brave browser - seems to have a hard time remembering the previous window position when re-opining. I have it maxed, and it keeps re-opening it windowed, but in a large window.. Repo version of Brave. Edited to add, also noticed the right click menu is black and I have to move my mouse over it before it will draw the contents. I like to right click and open things in a new tab, and now I have to wait for the option to show up.
Also oddly enough when I updated today, for the first time ever since using Solus (I started full time with the Plasma Beta), I got a corrupt DB and had to recover it. Not sure if it was Wayland or not, but it sure is odd timing.
Thank you btw for the absolutely excellent documentation: https://help.getsol.us/docs/user/troubleshooting/