Kinda rich dissing KDE for its "unstability" and putting GNOME as its paradigm, the very DE well known to break every major version.
Sometimes this kind of posts/"content" make me feel like I must be the only person in the world who hasn't had major issues with KDE and it's been absolutely flawless lately, specially since 5 - but I then realize people without issues don't complain. It's the people who have issues with something that make the noise and make it a very big deal (and I'd argue most cases are of the PEBCAK type).
If the need is for something simple and stable I'd shoot for something like Xfce - but putting GNOME as the example of "stability" is nothing but laughable.