a .net based language probably already has hooks into the office API's, that would be one reason to use iron python vs. regular cpython.
edit: oh I see what you are getting at. a new product from a new company created at mit in 2012. https://www.datanitro.com/
I would argue that a $500 license is also not targeted at newbie programmers either.
can you run native python from excel without shelling out $500 ?
Oh, and it's free for non-commercial use (educational etc.)
I'm still curious as to how putting any "real" programming language behind spreadsheets is supposed to fix the situation that happened last week. the blog wasn't very convincing and it feels like it's just giving a poor disciplined group of people a more powerful tool to screw things up with. That's not a future I look forward to.