Extensibility: The "100% Lisp" Fallacy

So, I’ve seen some articles promoting Emacs-like editors written in Lisp
languages, and one of the most common arguments seems to be: “it’s written in
This Lisp and also scriptable in This Lisp, and that gives it great
extensibility.” 1

It’s not wrong, but I think it does overlook a few things.

By the way: Happy New Year!

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