Well in the example above, an autoback will contain the same data that caused a file corruption. If you're working on a file for 12 hours straight, and introduced a corruption 2 hours into it, it doesn't matter how many autobacks you have.
it would take the fun out of recovering files? :P well when maya crashes its most likely that it saves a copy of the file in your temp folder... 80% of the time it works for me... but using our inhouse autoback to ensure safety :)