The title is a bit misleading, there are of course more than two markup languages. The author says that only TeX and SGML families are proper arbitrary markup languages. Lightweight markups are not arbitrary, structured languages like YAML are not markups.

Karl Voit with another banger.

Plaintext emails are slowly becoming an artifact of the past. Still, there’s a lot interesting things about plaintext emails. Including... plaintext-only formatting!

Some good and bad choices here. Worth a look.

Today in "our novel form of NIH," why does Bluesky use the richtext facets system instead of Markdown?

// slightly simplified
{
  text: "Hello @bob.com",
  facets: [
    {feature: "mention", index: {start: 6, end: 14}}
  ]
}

Also talks about DolDoc, which I'm long interested in.

A proposal for the next generation of portable documents.

Focus on your text and let Typst take care of layout and formatting. Sign up now and speed up your writing process.

Gotta try someday? Maybe layout my future zine with it?

A fresh take on typesetting

Seems to be descending from the Portland markup family.