GitLab hosts hundreds of thousands of open source software projects, and had massive data loss due to a sysadmin error. They didn’t have working backups:
So in other words, out of 5 backup/replication techniques deployed none are working reliably or set up in the first place.
It’s not enough to “have a backup”. You need to know your backups work. I’ve been preaching this for fifteen years now.
Step One: Back up your data.
Step Two: Test your backups.
Check your backups now, people.