Comment by lunar_rover

It's part of "What's been keeping Linux from having good UX up to this point?"

Making good products means lots and lots of drudgery, just for fun volunteers aren't going to touch that, and the stereotypical FOSS contributor is the type that's clueless about UX and puts stability above everything else.

Have fun convincing someone feature x is too overengineered to be usable by anyone who's not an alpha geek and should be simplified to a single switch. Not to mention proper large scale usability testing likely being unaffordable.

So designers stayed far, far away.