Update and stable = PCLinuxOS
For up-to-date, rolling release, and yet very stable, reliable and even conservative on some aspects (kernel, for instance), I have changed from systemD Debian to PCLinuxOS (no systemd). I am very satisfied. My working machines cannot allow failures or breaking up in upgrades, as I have experienced in some KDE Debian testing machines, last year, sadly.
At office an home, I am running 10 computers with PCLinuxOS (32 and 64 bits, LXDE, MATE, mostly, and 1 KDE).