I never used arch so I can't comment on that.

I'm comparing it to my experience with Ubuntu where packages can have complex install dependency flows that can destroy your system at any time. They also pollute your entire system. This is simple in the same way assembly is a simple way to program. You can do anything and destroy anything. It's essentially spaghetti code but in OS form.

You can say it's "user error" or "packaging error", which is arguably true, but this "user error" and "packaging error" literally does not exist in NixOS. Installing a package is unable to touch anything outside of it's own designed nix store folder. That is why it's so much simpler to understand for me. I can check the nix store path and see what a package has. I can fearlessly install a package without worrying my system will break. I don't have to worry about residual dependencies remaining on my system.

The nix language itself ain't it though, I agree.