Wishlist: a history, not just for applications
How about a history for the operating system? Each “state” would visit an application—in order of usage—showing the most recent version of the document that was open at the time of closing. It would also save this history by calendar day, for referencing later. That could be very useful for locating documents for which you’ve forgotten the names, as well as reminding you of what you worked on in any given day. Who do I call?