Yes, but it's not sufficient. Apple's Numbers had possibilities in this regard in that you could have multiple spreadsheet tables within a larger document that

Yes, but it's not sufficient. Apple's Numbers had possibilities in this regard in that you could have multiple spreadsheet tables within a larger document that might have surrounding explanation, although you're wrestling with text in a text box for that. And Numbers itself is pretty inadequate for even intermediate spreadsheet usage - for instance it doesn't have XIRR or XNPV. Take Jupyter's flexibility, add in tables, multiple sheets-per-documents, and reactive calculation, and allow it to run offline or as desktop software, and you're getting close.