Neon was actually the first distro i ever used for more than a few days. I used it for about a year before i switched.
I don't know if things have changed, but the KDE devs don't 'recommend' Neon for normies. The only reason why i can think of is because it gets Plasma before anything else, so it can be a little unstable.
Well, the Dev's are not satisfied with it, too because of the Adjustments they have to do for offering this LTS Base with an up-to-date KDE Desktop. That is the Reason why KDE Linux is in Development.
It isn't directly recommend, yes. But it is usable. Another Option would be Fedora KDE. But this doesn't have a Debian/Ubuntu Base.