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If any, having Elisp support on Guile would have far more sense, and with a JIT and non-blocking IO Emacs would be usable enough even under a high subprocess load (cough, GNUs).

I am not an Emacs user but I like Scheme (scm user here) under nvi, and a lot of people could profit from a Modern Guile based Emacs environment.

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I'm not sure. Guile-Emacs has been talked about for ages but never materialized. Scheme is nice and all from a language purity sense, but emacs lisp just feels so very practical for its use case.

I meant Guile supporting Elisp, it already supports a few more languages than Scheme.

There is branch for elisp support in guile. https://git.savannah.gnu.org/cgit/guile.git/log/?h=wip-elisp

It works in principle but is slow due to some impedance mismatches that have to be bridged. Especially, Emacs has a special string format internally that is not native utf-8.

Andy Wingo is making a great job with JIT-support for Guile. We have to see whether emacs-guile can become fast enough to replace native-elisp. At this time it doesn't look like it...

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