I had a similarly great experience with Arch but sometimes the system upgrade would mess up libraries required for the screen locker and I had to use loginctl u

I had a similarly great experience with Arch but sometimes the system upgrade would mess up libraries required for the screen locker and I had to use loginctl unlock. I also didn't like that every system upgrade would make a lot of AUR packages broken, waiting to be recompiled. I solved both problems by moving to NixOS and I have been very happy since then. I haven't had any issues with it so far. I've also created a couple of Nix expressions for packages I was missing, but I found most of the software I use in Nixpkgs or NUR already.