Just got a steam deck and immediately checked out the desktop mode, and I was somewhat surprised to see KDE and pacman as opposed to GNOME and apt, I have nothing against the former though a strong preference for the latter, anyone know why Volvo went in this direction?
I don’t think it has anything to do with Arch being a rolling distro.
SteamOS isn’t a rolling distro, it’s by releases controlled by Valve.
Even on a Debian base they could have done the same, like Ubuntu releasing versions independently from Debian.
Because SteamOS is immutable, the simplest today would be to use a Fedora Atomic base.