The two pain points of using a Jupyter Notebook are, cell dependencies, not being able to partially re-compute only what's needed when you change something like

The two pain points of using a Jupyter Notebook are, cell dependencies, not being able to partially re-compute only what's needed when you change something like Excel does, and missing a concept of library/immutable codes. JetBrain is specialized in listening devs, code mining and smooth integration. It seems like a good match, at least in my head :)