Also it’s just wrong advice, since you explicitly need --no-preserve-root for it to work… /s

Jokes aside, please don’t troll anyone with things, that can have severe consequences. Yes, they should have a backup. Yes, they should know how to restore from it. Yes, they should have tested it prior. Yes, you shouldn’t blindly trust people online.

But even then: Assuming my backup works and I can easily revert the damage. Maybe I need to complete an assignment until tomorrow and just lost 1-2 hours because my PC was busy doing the restore? There’s always a high chance of collateral damage