> it'd be surprising in any case to encounter dynamic scope in Javascript, a language which does not even support it.

Doesn't matter much, but just b.c. it's interesting: JavaScript actually does support limited dynamic scoping - `this` is scoped dynamically like in usual Lisps, and there's a with statement[0] that acts somewhat similar with `let` in Lisp.

[0] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...