imagine you do n undo's in your code. After that you may want to be again in the state before doing the first undo, so you will click your redo button n times (losing time) again...
I didn't find any IDE that have the same functionality as clicking n times the redo button but with just one click. I have called it by myself "full redo".
The "full sudo" feature would take you to the file state when you opened it, and combined with the ordinary redo button could take you forward in the development of the file from the moment you opened it.
Do you understand me? Could you implement this? I find it useful.