We are talking at cross-purposes I think.
Consider the feature of your average word processor -- if it closes unexpectedly, it leaves the file alone but offers (Document Recovery pane) to restore you to your work-in-progress as of the last auto-pseudo-save (which doesn't write to the original, but to backup data). The user has the choice to reject the offered Restore, but if one isn't as careful at saving as they should be, it could save them quite a bit of almost-lost progress.