Wayland is super fast, free of tearing and can handle completely different monitors working together without issues. It is not wayland that makes it unstable, just that there is much more going on development-wise which can cause things to break more easily in a rolling distro. But I also had issues non-related to wayland but with Plasma, for example that after a plasma (and Dolphin) update, my NTFS partition could not be mounted anymore. Using pcmanfm-qt solved it.

Having a distro that tests things more or at least makes it easy to rollback, would help in such situations. When I was a student, these things did not nother me to much. But now with a demanding job, I just don’t want to put too much time on this things anymore.