“Anything that is currently modeled” would be true if we could guarantee the correctness of AI-generated code.

Business people prefer the familiarity of spreadsheets, or at least some kind of grid. At the same time, I am working on this software out of frustration with spreadsheets, because users are forced to translate A1*B2-style addresses into business meaning.

So I agree that code is one possible direction. But I think there is also a middle ground: business rules over dimensions. Enterprise tools like TM1 have explored this direction for decades.