When Ubuntu shipped KDE5, normal usability stuff broke horribly again. Nowadays I have two kids and a job managing a large IT organisation. I simply can't defend spending the time any more. So I switched to xfce for the time being. Of that breaks the UI in any comparable way, I give in to the hordes that keep ridiculing me for not using a Mac. :(
What do yo mean by "normal usability stuff broke horribly again"?
I'm using Neon now and it is one of the least annoying distros and DEs I have ever worked with.
Also I was bit by the bug that somebody else mentioned here: the panels would disappear with sweet reliability. If I remember correctly, this was a bug that would hide the existing dock. So if you simpy recreated it, you'd have two running side by side, and so on.
There was more but I don't remember specifics. The screen issues were enough to be a big practical problem for me.
Edit: speeling
I don't use docking and rarely use multiple monitors so that might explain a bit of the difference in experience.
Except the music player! It's pretty broken on a hidpi screen.
I would however expect it to work well on my 5 year old laptop.