How about Qubes OS? Also the parent never said anything about isolation and roll-backs. Nobody mentioned Silverblue except you. The discussion is about ordinary users, not hackers.
But honestly I did not like Silverblue. I had a 13 year old gaming computer I installed it on and I couldnt get the ancient GPU drivers installed due to the way things are containerized. This would have been a few commands otherwise.
Maybe its fine for chromebook-like things. I might have picked a bad testcase.