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Comment by az09mugen | Hacker News Reader

Someone created lem [0] which is basically an Emacs in Common Lisp. I don't know for concurrency but I hope it is designed to do so. Also there isn't org-mode.

[0] : https://github.com/lem-project/lem

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There have been several recreations of Emacs in Common Lisp over the years, including Hemlock, CEDAR, and Climacs. They never catch on, because they’re not compatible enough with the existing base of emacs lisp software. This also applies to Scheme, although it did get closer to compatibility once or twice. This is also closely tied to why emacs hasn’t been made much more parallelized - fundamentally, the design of emacs is too close to “a giant ball of global state”, mirroring an early Lisp Machine. It’s a high hill to design around, and it will violate basic assumptions made by most medium-plus interesting elisp code. Do not let this dissuade you from trying! It would be a great if difficult accomplishment!

Lem is actually useful though! And not a recreation of Emacs in CL, it's its own thing, unlike CEDAR (which wasn't completed).

I enjoy using Lem sometimes, but mostly use Emacs. Lem is a very cool idea, and with Roswell it is easy to install and manage.

All that said, it seems like Emacs has been improving rapidly the last few years: native compilation of Elisp, LSP support, good integrations with LLMs.

More than org-mode, it needs a Texinfo viewer. Once you can access SBCL's documentation (and internal docs), now you have an almost complete Common Lisp editor with the basic features from Emacs.

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