The current standard for Scheme is referred to as R6RS

R7RS small has been out since 2013. But yeah... "it's complicated".

We did an experiment a few months ago with compiling Gambit to JS and then serving it as an Office extension, using our JS FFI to interface with the Office JS library. Worked out of the box, but definitely some performance cost. Curious about performance on .NET.

BTW if Bob reads this, happy to hear you talk about this at the upcoming Scheme Workshop :) I guess this isn't available on Excel on the web?

https://icfp22.sigplan.org/home/scheme-2022 for those interested.