Sure, but that's not super different that series of commits along a feature branch. I think they accomplish the same goal. But am not dismissing notebooks as a way of doing that. I'm more familiar with ipython than jupyter, but particularly for more algorithmically complex programming tasks I think notebooks are a good tool.
I disagree with you only that this might be a good way of prototyping for something like ansible playbooks/modules, chef recipes, puppet manifests, etc. So much of the state is external (and intrinsic to what is being built) that I don't think it's a match of the rhythm of development there. But just my two cents, the best process is what works for you.
