I've tried. KDE Plasma on the 4k external screen is giving me big black blocks to the right of windows I move or for the launcher... Like a shadow. Flickering trails of black block shadows if I move windows around. The latest nvidia driver did finally fix the mouse leave trails of black boxes, though. No idea if it works for Gnome, I can't stand Gnome's layout, workflow, and window management.
The "TLDR" is sub heading is completely misleading. Cinnamon devs see they have to move, that's the reason. "Begging to work" on Wayland is not at all what the article says. Before you downvote, read it. Nothing in that article or the link to one dev's blog says anything even remotely like that.
The video card thing, if talking about NVidia, really is wayland's fault. The devs refuse to use the card and driver the way X did. I suspect it's because they don't like NVidia's licensing of the driver, and they're trying to make life a pain for NVidia users to for the business to make concessions.
At least the Mint devs are being realistic on the time span needed for Wayland to have a chance at working for everyone, unlike Fedora, KDE, and Gnome that are jumping the gun.
The long wait is over!