Great to see s7 getting some love. I used it as the Scheme for Scheme for Max, an open source extension to the Max/MSP computer music environment that puts a Scheme interpreter in Max, and I love it. It occupies a space somewhere between Guile, Clojure, and CL, while being very minimal, and is dead easy to embed. It is also much more liberally licensed (BSD) than Guile.
If you like CL macros with first class environments, you will probably like s7.
It's also dead easy to use in WASM, which I am doing for a music pedagogy project. It's using the icing approach, but I would say the cake is 3/4 icing. Notably, it was not difficult to make generic functions for calling JS functions from Scheme and vice versa, which has made things very smooth. A ganache perhaps. :-)
If you like CL macros with first class environments, you will probably like s7.
It's also dead easy to use in WASM, which I am doing for a music pedagogy project. It's using the icing approach, but I would say the cake is 3/4 icing. Notably, it was not difficult to make generic functions for calling JS functions from Scheme and vice versa, which has made things very smooth. A ganache perhaps. :-)