I’m looking for something simple that just works, with few crashes, few bugs and good community support. I’m moving away from Manjaro Cinnamon unstable branch to Ubuntu 20.04 and want a stable desktop environment. I only want bleeding edge software, but I want a stable foundation.
KDE 4 was only bad because the distributions insisted on pushing out stuff that was alpha quality at best and that absolutely wasn’t ready for use. Once one of them did it, they all followed and it became a mess, despite the cries of the KDE people begging them to stop. Once the stable versions came out, it worked fine.
Overall, KDE has always been a solid desktop.