It would be great to be able select two revisions of a document and somehow visually see the differences between them.
Often a design is handed off to engineering, it gets implemented, and then the design changes. When the engineer goes back to the file, it’s difficult for them to tell what’s different unless it’s pointed out visually by the designer somehow.
GitHub shows diffs for image files in a couple of ways. The “swipe” and “onion skin” views could be a source of inspiration.
It would be a challenge to avoid showing diffs that are too minor to matter, but those would be hard to determine. Just as whitespace diffs in code files aren’t helpful.