I've been daily-driving KDE/Plasma for... around 7 years now? And I have a really low tolerance for daily technical nuisances. There have been some issues over that period, but honestly not more than I would have to deal with on other platforms.
I also introduced a partner to Elementary a few years back and she has absolutely fallen in love with it despite the shifting set of glitches it has on every update (she calls "personality"). She's clever but not especially technical and had no Linux experience beforehand.
As I see it, there are essentially three desktop platforms to choose from: Windows, Mac, and Linux. Windows is moving in an ad-supported direction that I want no part of and there's even more that I dislike about what Apple is doing (and this from someone who was one of those weird die-hard Apple enthusiasts in the 90s).
So I didn't switch to Linux because I'm fanatical about it, but because it was my option of last resort for having a desktop environment that I felt like I could largely control and use the way I wanted to use it. And, it has turned out that I'm really happy with it, most of the time.
That's probably not going to be a persuasive argument for the average casual computer user. On the other hand, tired tirades against "the year of the Linux desktop" completely miss the fact that Linux is a completely reasonable desktop experience today.