I switched from Windows 10 to Fedora KDE 2 years ago and it's been good. Not great, but good. I do have the occasional problem with drivers and whatnot, but honestly Windows was just as bad, just with different stuff, and Windows was much less stable and much slower
I also switched to KDE, and man, not needing an online account to use a operating system, not having any ads or constant spyware sending every click and keystroke to some ad partner is absolutely amazing. Sad that to get a decent user experience feels amazing, even though it's not really anything special, really goes to show how bad things have gotten.
KDE is bloated, but coming from Windows10 it feels very familiar but with all of Windows' extra shite (ads/tracking/sign in/fucking onedrive) chopped out. I couldn't be happier with it to be honest.
[edit]: I forgot to mention as well, at least on arch you dont have to install the (I forget the package name exactly) kde applications package off pacman, if you don't install it you'll need to install dolphin and a few other things but it really cuts down the bloat.
Yes, this. I'm a long time XFCE user but when I got a beefier machine I switched to KDE, and unlike XFCE it manages the hardware thoroughly enough (sleep/brightness/network/audio) that I don't have to manually hack anything. I tolerate the bloat for that reason. I disabled all the kwallet and pim stuff though, that was a mess.
It's bloated if you judge it by the standards of the WinXP era. And I'm not saying that's unfair, but realistically speaking, it's not an issue for any modern PC.
I'm mostly a gnome 3 guy now, but mate is way underrated IMHO. I usually use it in VMs and the performance and usability is incredible. For those of us who grew up on this paradigm, it's a joy