Most backups haven't been thought through. But it's relatively cheap to send tapes somewhere and feel warm and cosy even though if you thought it through you are just making tapes and paying people to handle them. They don't do anything.
I was at a FTSE top 50 savings investment org a few years ago overseeing service assurance for a data centre migration transformation. Anyway.
Techies proposed losing tape. Made sense. Business managers got diarrea cos they thought 6 years of tape backup covered their asses.
On investigation the app guy Jerry could remember one occasion in 20 years where he had gone yeah ok I will get a tape and have a look if what the business want is there. It wasn't.