Working on Cursor for Excel: https://www.tryalphaexcel.com/
As there is no open source version of Excel except Libreoffice, working to build the core Excel functionality with other open source packages. Then bringing in agentic editing functionality for real world data.
What is also has been interesting is to introduce banker/consultant formatting guidelines to the agent and making it beautify its work whether in tables or models.
Cant it be a VBA script interfaced to an external app? This way you could use standard Excel, no?