Didn't think so. Most people don't. Not even people who know better. What? You *do* have backups? Awesome! Have you ever tried to restore from them?
And that's the key. Backups are probably the #1 neglected task in all of IT, but should probably be closer to the #1 priority. Unfortunately, a lot of people (probably the vast majority) who do perform regular backups never test them to see if they could successfully restore.
A wise woman once told me, if you haven't tested the restore, then you don't have a backup!