I might have needed to edit down my comment, but you locked on to the least important part of my argument. If reproducibility is important, like you say, then

I might have needed to edit down my comment, but you locked on to the least important part of my argument. If reproducibility is important, like you say, then a notebook is the last thing you want. Your code needs to be tested and designed like the software it is, instead of tossed into some notebook that does not fit into classic software practices.