I've been on Pop for about 5 years, through several major upgrade cycles, and it's nearly flawless. The bundled Pop!Shop app store is the notable turd in the pool, but it's optional. It has a system restore partition (that I've never had to use), boot-the-previous-kernel (that I've used once), full-disk encryption by default, so many little things that I appreciate. Everything Just Works, on both my old Thinkpad and my new Framework.

When I have had trouble (e.g. stuck updates, other apt woes, Bluetooth weirdness), System76's help pages have been great. If they don't cover it, I just search +Ubuntu and the advice I find almost always works.

I have no idea what WM or DE or anything I'm running, it's just here and it stays out of the way so there's no situation where I would be confronted by having to know its name. That's a bit annoying (I did finally find out that "Files" is actually "Nautilus", which helped when searching to understand some behaviors) in that it limits my ability to meaningfully search for, or change, these details, but I think if it was a big deal, I'd figure it out. It's just fine.

That I can run an OS for 5 years and not know my WM or DE, is pretty cool, IMHO.