The thing that is Cool about those Notes is you have a running Perspective of how the Recipe is Evolving. Something that is Very Important if you move away from it Now, but come back to it sometime Down the Road.
It's just Hard to do all that from pure Memory.
I do the same thing in my barbeque and homebrewing. Nice thing about homebrewing I have a program like ejuice calculator called Beersmith. But I do the same thing there as I do with ejuice, don't have the original to before current recipe flow.
Not found the same for barbeque so have an Excel program for that (use to compete in KSBS, still a KSBS judge though). I do have notes from original to current bbq recipes for rubs, sauces and other recipes.