Extensibility: The "100% Lisp" Fallacy

Table of Contents 1. The argument 2. There is no "100% Lisp" 3. Workaround-ish extensibility 4. "Spacebar heating" extensibility 5. Extensibility takes efforts 6. Footnotes 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…