It makes more sense when you consider that this seems to be intended as an alternative to (Jupyter, etc.) notebooks, which are a major way of communicating meth

It makes more sense when you consider that this seems to be intended as an alternative to (Jupyter, etc.) notebooks, which are a major way of communicating methods in the data science segment of the Python community. Notebooks are linear sequences of cells with an arbitrary number of lines of code inside of them, and these cells can be executed one at a time in arbitrary order. A lot of the time the dependencies between these cells (whether it be conceptually, programmatically, etc.) is not linear. There therefore arises a lot of cognitive load in both trying to present (via comments, etc.) this structure as a writer and parse this structure as a reader. I imagine that is the kind of problem this is meant to solve--drawing out and visually solidifying that structure. From this perspective, I'm not sure if there's much apparent value in making the 1 cell <==> 1 function call constraint the default.