Honestly, this is only necessary when there is no virtualization, the system image is mutable, and not managed by configuration management. With virtualization

Honestly, this is only necessary when there is no virtualization, the system image is mutable, and not managed by configuration management. With virtualization, snapshot and restore functionality makes this completely moot because it occurs outside of OS and captures the entire system state. If the system image is mutable and not using configuration management, then system entropy is a real problem. Better have backups before "trying" anything you can't undo or has side-effects. You generally should have backups, configuration management, monitoring, and minimize attended commands issued and log them. Attended fiddling is the path to entropy and problems.