Org mode also let's you tangle your code chunks into separate files. And you can specify different files (or the same) for different chunks so you can kinda have programs split into files while doing everything in org. I really like this feature, I used to use Knitr but I don't think it's possible to tangle different chunks to different files.
Org-babel is a treasure and I much prefer it to Jupyter.
However, while org-babel is feature-rich in obscure ways that I constantly discover, it's still missing some out-of-the-box convenience like automated figure management and running multiple code blocks (like running code blocks to the middle of the page - not all the way through).
