I've spent 6 months in KDE after years on Windows, and KDE is crap in both UX and number of bugs. I love the idea of open source, but there's a long journey ahead to even match the state of Windows 2000.

KDE has improved a lot in recent years, but yes I would agree that it still has plenty of rough edges and little unexpected (as in slightly jarring) differences in behavior from major commercial desktops.

I still prefer it over the bloated pile of upsells that Windows has become, but I think there’s still space in the Linux desktop world for a legally-distinct clone of Windows (sans the bad parts). KDE isn’t that, it’s its own thing and is best fit for long time Linux veterans.