I was going to mention this plugin. I haven't fully mastered quickly jumping around in it, but it's one of those things that when it's useful, it's VERY useful.
Ditto. Unless I have to go back a lot of edits, I don't actually use the plugin that often. I've mapped my undo/redo keys to traverse the undo tree instead of the undo stack:
nnoremap u g-
nnoremap <C-r> g+
It takes a little bit of getting use to, but it takes care of most instance where I need a previous edit from a minute ago.
> There might be plugins that somehow present this info in the interface.
The undotree vim plugin [1] does this, and gives both the file at the time as well as a diff of what changed.
[1]: https://github.com/mbbill/undotree