[busterarm]

The idea of using a language without Map/Reduce/Filter as a substitute for a Lisp, in an editor built around Lisp...seems vaguely antithetical to me.

[quasilyte]

You can call map/reduce/filter from Go code: `xs := lisp.Mapcar(f, ys)`.

Mapconcat is already used inside runtime implementation: https://github.com/Quasilyte/goism/blob/master/src/emacs/rt/... (Print and Println functions).

[43224gg252]

Why did you get downvoted for this?

[flavio81]

Antithetical and immoral (immoral as in "violates ethical principles")