As an aside and unrelated to the content of the article ... but the form of the article, with footnotes in the margin, is really useful.

Thanks! It's inspired by this https://edwardtufte.github.io/tufte-css/

Another quick question for you, what are you using to make those hand-drawn looking diagrams? They look amazing.

I'm using Excalidraw :)

[0] https://excalidraw.com/ [1] https://github.com/excalidraw/excalidraw