Guile is supposed to be the GNU extension language, which meant there was a political incentive for guile Emacs, but it was never asked for by the Emacs people.

Guile is supposed to be the GNU extension language, which meant there was a political incentive for guile Emacs, but it was never asked for by the Emacs people. Considering the amount of bikeshedding going on for faaaar less intrusive changes to Emacs, I have doubted guile Emacs success for a long time. Guile now runs elisp, although there is a lot of low hanging fruit left when it comes to optimization. Guile is shaping up to become a very neat little VM, with proper threading, JIT compilation, and delimited continuations. I think the idea of elisp running outside of Emacs, with access to all of the gory glory of Emacs libraries sounds fantastic. Imagine org-mode and a (emacs PKG org-mode) library you can use outside of Emacs with a sub 0.1s startup :)