Agree 100%. Only thing I’d add is that the killer feature of the extension is that it allows one to treat ordinary python files as notebooks (without converting

Agree 100%. Only thing I’d add is that the killer feature of the extension is that it allows one to treat ordinary python files as notebooks (without converting!) by 1. Connecting to a persistent kernel instance 2. Allowing the user to use magic comments to delineate code cells within the python file. With these two things, and the ability to export as a real notebook, you get the great experience of a notebook — submitting easily editable cells to a kernel one at a time, as many times as you want — without of all the usual baggage that that would entail. Plus you get to edit in a decent editor (and edit things other than just python files in it) instead of the crap Jupyter forces you to use.