PCLinuxOS is the bastard child of mageia, itself the child of mandriva, of mandrake and conectiva, the last a very, very excellent RH derivative from way back but loved by its Brazilian parents and truly groundbreaking. Live upgrades between major distro versions!
It’s an RPM distro - thus massive validity checks all the way down - with highly versatile app versioning and ranges, and no fucking systemd.
It just has a terrible installer and no templates or boxes for vagrant / etc.