I'm genuinely curious why python instead of something like PowerShell for Excel specifically. Seems a little out of the farm but I also get how it's a more adopted language.
Incidentally I've worked on many products in the past, and I've never seen anything that approaches the level of product-market-fit that this feature has.
Also, this is the work of many people at the company. To them go the real credit of shipping and getting it out the door to customers.