Say valve pushes out a bad update that messes up the package manager list or puts it in a bad state, there is no recovery method. I guess one thing they could d

Say valve pushes out a bad update that messes up the package manager list or puts it in a bad state, there is no recovery method. I guess one thing they could do is have some button combo you hold while booting which copies a fresh OS copy from a protected partition. I'm sure you could imagine countless ways that a update could possibly break things.