i use arch (btw), and i hate how much i depend on the AUR, its very unstable. I switched to flatpak for my gui programs since the cli experience sucks. nix on the other hand works like a native package manager, and thats great for me. but i see that nix also includes stuff like coreutils (because of nixos im guessing). do i install everything with nix? if not what packages do i install with pacman and which with nix?
I’d say anything that concerns the system (services, DEs, drivers, the kernel etc.) should be installed via the system package manager.
User apps and dev envs can be installed from anywhere else, including FlatPak, Nix or language package managers such as pip.