It's mostly so the average user can compare the full Plasma DE side by side with windows and not shit their pants when they find out it's penguin based.
The day the Penguin goes mainstream is the day they decide to finally bite the bullet and start making distros with WINE preinstalled. Same goes for the other UNIX-derived FOSS OSs, like FreeBSD.
I've finally tried KDE (on Fedora) a few weeks ago (after, like, years) and it's actually really solid, love it.
None of the BS and attitude of Gnome where they put basic functionality behind third-party JS addons that break every update and when you complain they tell you you shouldn't need them... Also has much more sane defaults and immense customizability out of the box, through settings. None of that nonsense where you have to hope that you'll find some obscure gconf option that will solve your problem.
Yeah, I've rapidly come to find KDE Plasma to be the best Desktop Environment overall. It's clean, powerful, quite stable, and so, so much more fully features than Gnome is.
I'm holding off on seeing what System76's Cosmic will be like, but if it doesn't turn out like I hope, I may we'll switch to KDE Plasma (likely on OpenSuse Tumbleweed if I can manage it with my Nvidia system).
