From the README:

> Scheme/Lisp should not be forced onto the user. It's error-prone and harder to read by humans, compared to Rust/TOML/Lua/...

I get the argument of preferring TOML over a Turing-complete language for configuration, but to claim that Rust is easier to read than Scheme, or that Lua is less error-prone, is... interesting, to say the least.

I saw similar comments in the linked issue that tracks the proposal. I think people object more to functional programming and S-expressions than to Scheme itself, which is a shame. There's a lot to be gained and learned from Lisps once you get over that initial reaction.