Tangent, but I deeply appreciate the treatment of footnotes on this article, just floating alongside the text in the right gutter instead of at the bottom of the article. It seems so obvious (at least on desktop) but I haven't seen it before. It's so nice to be able to see whether it's something I want to read, or just a citation, without clicking and losing my place (yes, I know there's usually a link back to the article flow, but especially in the "sticky header" era we've been in for decades, that rarely works well).
Thanks! Also, if you squish the browser down to mobile-size, they turn into end notes. It took me a bit of experimentation to get it like this!
Tufte CSS[1] provides a style for this, I like the good use of the "wasted" space in the margins of most browsers.
[1] https://edwardtufte.github.io/tufte-css/