Not the OP but my most recent attempt to ditch Windows on my gaming desktop ~6 months ago was tripped up when I discovered that core software like file managers and such still crash or wig out constantly (it's always been that way, I simply used to put up with stuff like that, just hoped that had changed since I'd been away) and generally basic interactions (e.g. drag & drop) are still inconsistent and buggy. This on Ubuntu which is allegedly relatively polished. Tried KDE and Gnome both (Gnome's performance was also terrible, incidentally).

And all of it looked pretty bad. I'm a fan of (though not insistent upon using) "ugly" old school interfaces, so it's not that it wasn't "flat" or "beautiful" enough or whatever the current trend is, just lacking consistency and the result of a whole bunch of small, poorly-chosen defaults adding up to a big stew of gross. I could overlook that if it weren't also crash-prone and janky as hell, but it is.

So I'm still stuck on Mac for anything serious, and my gaming desktop sits in storage because I can't be bothered these days to screw with either Windows post-10 or Linux. Sigh.

FWIW my favorite desktop I've ever used, as far as core software, stability, desktop UI/X, compared to its contemporaries, was BeOS.