It isn't Fedora, its upstream. Think about working on a document, making some massive changes and then finding that autosave ate your old document up to. No chance of undoing easily. Your wife wouldn't be too pleased as well (as the default undo actions aren't all that high either)
I wonder if this entire time I have been confused by something. Is there a difference between what we are talking about, i.e. auto-save, and recovery from a system crash? Are these different things all together?
Sean