I\'m working on a project:
Ever make a change to a file and think "Oh sh**..., I wish I could undo that!".
That's why a one man development team still needs version control.
Edit: I should clarify that version control allows you to cherry pick revisions over your entire project history. With most systems you can do a side-by-side compare before reverting as well. This is a far cry from simply picking a backup at some point, restoring it, and hoping you have the file you wanted.