When I was working on my thesis, I had an appendix of annotated source code that was generated by a series of Julia macros that effectively turned my code inside out to make a LaTeX document. The custom macro-comments became the bulk of the LaTeX source, the code got wrapped in some environment that presented it with syntax highlighting and all that.

I was halfway through implmenting the syntax highlighting Vim plugin for the resulting Julia-LaTeX hybrid format when I realized that I had an actual deadline coming up, and just accepted solid-color LaTeX source.

I mean that honours the legacy of how TeX came to be - in spirit at least.

> This method, dating back to the 19th century, produced a "classic style" appreciated by Knuth.[6] When the second edition was published, in 1976, the whole book had to be typeset again because the Monotype technology had been largely replaced by phototypesetting, and the original fonts were no longer available. When Knuth received the galley proofs of the new book on 30 March 1977, he found them inferior. Disappointed, Knuth set out to design his own typesetting system. [1]

[1] https://en.wikipedia.org/wiki/TeX#History