Yeah, I didn't really mention it but my days usually involve working all day on Linux, but then switching to the Mac (using the same set of monitors, via a KVM

Yeah, I didn't really mention it but my days usually involve working all day on Linux, but then switching to the Mac (using the same set of monitors, via a KVM switch) in the evening to do non-work stuff. So that switch has to really work and not like... work most of the time, but jank out on a regular basis. (Which I found to be the case with X11.) KDE+Plasma works with this daily routine too (although it is better to lock the screen first so it doesn't have to try to re-layout a bunch of windows).