Well... doesn't that circumvent the point of backups? Backups in my mind are supposed to be like read-only, can never be modified so that the system that was

Well... doesn't that circumvent the point of backups? Backups in my mind are supposed to be like read-only, can never be modified so that the system that was corrupted can't do anything harmful to the safe previous checkpoint. I guess it has to have some method of what you mention then. If someone wants their data deleted, yes, what about the backups?