Good point. Though the deck actually keeps a backup. Updates are done to a second partition and if it fails to boot for some reason, it automatically rolls back to booting from the previous good installation. That's why it's really hard to completely brick the system.

But also why with every update all the modifications you did are reverted. Not that big of a deal once you know about it though, I just have a script that installs and configures everything after each update.

People should know its an option they can. Explore. Especially since this person was using it as a reason to call the steamdeck not a PC.