So..

a) I get that a lot of users use KDE. And they love the Desktop Environment. But is there demand for an OS? Would those users switch? I hope so, but for such a big decision to build, support, maintain a whole OS, i'd expect some kind of poll maybe? Some input saying "30% of KDE users would switch to KDE OS"? Is there some kind of proof? I've been using Gnome OS for years but never felt i would want to switch to some Gnome OS. The Desktop Environment is one of many tools in my distro (for me, at least).

b) Supporting lots of hardware (expecially Laptops!) seems to be a huge time sink for people not primarly involved in kernel/driver stuff, or not?

c) ok..

d) Same as a): Will all KDE devs use KDE OS? And is it good to have the KDE Devs use KDE OS, when the majority of users use Arch/Debian/Ubuntu/Fedora? I'd rather have a good chunk of those devs use my distro...