That’s fair, although it could go further with how an immutable distro isn’t as effective for some of the desired uses - in the case of the Steam Deck it’s designed to do what it does and it does it. Other Linux installs are retroactively configured by the user, where whether it’s a regular computer for grandma or a server for a homelab will net you wildly different results of what distro you choose.

While it’s nice having options, it doesn’t make things easier for new users when searching. Having a hundred ways to solve a problem just makes the problem more annoying to solve (inb4 rtfm)

Also, I just remembered I lied. There’s one other Linux install I’ve never had issues with which was Tails, though to your point can be operated as immutable, though I think at the time mine was not set up to be RO