SteamOS is highly customized and managed by Valve. It doesn't have the Arch repos or pacman. Updates to the OS come from Valve in large releases rather than per package. All apps installed either come through Steam or Flatpak.
So it's Arch in the same way Android could be called Linux.
so the available software is a bit limited then
I can still customize and configure things, or not really?
does that mean I can't customize the OS, like shortcuts?
The way SteamOS works is a bit weird. By default the OS partition is read only, you can do whatever in your user directory. But they let you unlock it to make whatever changes you want.
I’m pretty sure that this OS partition gets completely wiped every update though so your customisations will have to be reapplied.
I read many people saying "it's just a PC", but I am a bit skeptical for now.
I will probably wait for reviews to see how it goes
I still feel very interested, though, but I would need to adapt some workflows that I have with paint.net for now