With Google, I don't have to care how often they are backed up, or when. If a file is missing or corrupt, they deal with it automatically. I don't have to notify them.

And if a file is unrecoverable, there's no point in contacting them.

It appears the only thing gained by having a local IT Dept is being able to un-delete things you accidentally deleted. In this day and age, I solve that by just not deleting things. Google solves it by having a 'trash can' concept where you can undelete it yourself.