[heintje_ghulam]

It might be the case that being able to use Emacs Lisp outside of the Emacs editor in a (potentially) more robust environment designed for general purpose programming could potentially give Emacs Lisp more legitimacy as a programming language in its own right (not just "a scripting language for an editor").

However, it seems that some people have another goal in mind with the Guile-based Elisp: actually replacing Emacs Lisp, or phasing it out, or whatever. I think that is a terrible idea. I also think their goal of mixing languages inside of Emacs would have the negative consequences you describe.