I have about 3000+ packages installed in my system (nix-system) right now. As I search for neofetch on the internet, it seems people only have about <500 packages. Am I doing something wrong?
Careful, too many packages on one drive becomes unstable, and may collapse into a singularly— technological, astrophysical, or worse, both!
Seriously, though, it's fine. The trend these days is to isolate network services/apps, each in its own virtual server/container, for security reasons. If that service gets breached by hackers, or the configuration breaks, no other services are affected. A lot of installs, each with only the minimum packages for one service, is bound to bring down the average package count.
A user workstation is bound to have many more packages installed. Install what you need and prosper.
Neofetch gives me 175 (nix-system), 1437 (nix-user). Most of my stuff's in home-manager