Story time: Before AWS CloudFormation had stack protection flags, a former coworker (who was not performing well to begin with, unfortunately) accidentally deleted a production database stack, taking out all automated backups (and thus all backups) with it. The rest of the day was spent on the phone with AWS support, who agreed to backdate our not-yet-started enterprise support contract and later found a not-yet-purged backup on a disk somewhere that was fresh enough to be usable without too much customer data loss. Probably the worst day of my tech career.