If your backup is inside the same thing you backed up, you don't have a backup. You have an out of date copy.

All my backups are inside the same universe as what is being backed up. A boundary must be drawn somewhere and this is one of many reasonable boundaries. As I understand it, the backup isn't "inside" the volume but is attached to it so that deleting the volume deletes the backups.

>All my backups are inside the same universe as what is being backed up.

Unless the commenter was backing up their entire universe, this comment is a non sequitur.

Can we at least agree to draw the line so that if a single call can delete the live data AND all backups, they shouldn't be called "backups", but rather snapshots?

I would also say that if your backup is controlled by the same third party as the primary, it's not a backup.

Did you back up the universe inside the universe? Otherwise your comment doesn't seem related to what I wrote.