Mixing can work pretty well. I'm using Plasma with i3 as a WM, and it hits the perfect spot for me. Not sure if the same thing can be done on Wayland, though?
I would expect it to mostly work. Standardizing the interface between the window manager and clients. So as long as Plasma isn't depending on any special behavior (by intention or assumption) of KWin it will work just fine.
MadnessASAP|11 months ago