I don't know what I should say tbh 😅
For the start, you can read my post about image based distros: https://feddit.de/post/8234416
Imo, Fedora Atomic is NixOS made easy. You can go to the uBlue-builder and modify a custom image if you're a tinkerer.
NixOS is down-to-top (local config file that defines your host), while uBlue is top-to-bottom (you modify an image, image gets built on GitHub and then shipped to you).
This allows you to fork or create an existing "distro" without having to maintain a whole distro yourself.
Other than that, especially uBlue is extremely user friendly imo.
- It updates itself in the background, updates get staged and applied after you've shut down your PC in the evening.
- You can rebase anytime you want to another flavor, e.g. I switched to KDE 6 from Gnome after it came out.
- You have to use containers for everything (mostly Flatpak, but also Distrobox or Nix)
- It's ultra low maintenance and even more reliable, you can boot into an old image if a new update broke anything or made something buggy
- For a casual user, not distinguishable from regular Fedora
- And much more
I love nothing else more.