I think it's easy to do notebooks wrong, but possible to do them right. I try and do quick prototyping in notebook cells before moving it off to a separate .py

I think it's easy to do notebooks wrong, but possible to do them right. I try and do quick prototyping in notebook cells before moving it off to a separate .py file, and avoid keeping any code that does anything other than visualisation or parameter setting inside a cell long-term. That way, if you need to run something "in production" (whatever that means in your context), you don't end up having to pick apart and re-write your code -- you just import the .py file you wrote along the way. For me, notebooks are a super handy way of visualising and sharing results during meetings, and it's difficult to imagine a more convenient alternative.