Yeah I agree, I am sure they are missing some obscure stuff. But in practise it has everything that I use and there has been no need for me to touch flatpak/appimage/snap

yep, I mean a GUI based software centre

NixOS:

• Largest and most up to date package repository (no need for flatpack/appimage/snap ect)
• Reproducible
• Declarative
• Rollbacks you can select at boot time
• No dependency conflicts

I think it will easily be the number 1 distro if/when they can :

• the steep learning curve (e.g. have a gui installer EDIT: As in a GUI software centre)
• documentation
• have more tools use nixos and have nixos in mind (e.g. there are a couple of tools that didn’t work for me because of specific C libraries not beeing present/configured on nixos that are present on other distros. some libraries implicitly expect these to be present).