Comment 32 for bug 1446865

> what is supposed to be the third major "stable, non-beta"

No, it's not.
Plasma 5 is not nearly ready for productive use and there also still major bugs in (released) Qt5 versions.

It's "reliable and usable enough™" for everyday testing (you can install it next to other desktop environments, some distros allow to aside it next to KDE4) and development on it and you're encouraged to do so, but there still be monsters (worse than this, the QScreen::handle() bug killed my ksmserver today...)

Somebody tells you different: he's lying. Period.
The numbers are marketing bs. Has been the same w/ KDE4 & KDE3.

/disclaimer: personal opinion