I think Rhino can consider some command showing geometry, curve difference of each incremental save data, so that I can quickly remember what area changed or taking previous right features to replace when client need.
If the history of undos are available when open each incremental save files, I can even remember what steps I did.
My project always have some hundred parts and each parts have over hundred incremental save, so helping me to remember is very important. I hope Rhino developer really consider this. Thank you.