What's interesting about that is that John Gruber uses footnotes extensively in his own blog posts (and has since approximately 2005), but chooses to implement

What's interesting about that is that John Gruber uses footnotes extensively in his own blog posts (and has since approximately 2005), but chooses to implement them with HTML snippets rather than having created a dedicated Markdown syntax for them. For example, see https://daringfireball.net/2005/07/footnotes.text https://daringfireball.net/2005/07/footnotes.text