I'm sorry to raise your blood pressure (;p), but this laptop (bought over 3 years ago) hasn't seen anything else other than KDE Plasma, the first couple of months with X, but with Wayland since then. I have seen none of the issues you've listed, nor did I notice any performance or battery life degradation with the switch, quite the opposite -- while the battery life seemed to have remaining pretty much the same, performance (specially with multi-monitor setups) is much better. My laptop also has dual GPUs (discrete Nvidia and integrated Intel) and I notice no differences between running with nvidia completely turned off and in optimus hybrid mode.
My only issue is, ironically enough, also with multi-monitor setups, where the layout and main monitor selection seems unstable and sometimes changes when waking up from sleep. I've been following KDE's development (through Nate's incredible blog[0]) and I'm pretty sure these problems have been fixed with the new 6.0 release.
But yeah, you seem to be particularly affected by bugs, sorry for the experience. What Nvidia card do you have? And driver versions?
My only issue is, ironically enough, also with multi-monitor setups, where the layout and main monitor selection seems unstable and sometimes changes when waking up from sleep. I've been following KDE's development (through Nate's incredible blog[0]) and I'm pretty sure these problems have been fixed with the new 6.0 release.
But yeah, you seem to be particularly affected by bugs, sorry for the experience. What Nvidia card do you have? And driver versions?
[0]: https://pointieststick.com