The article doesn't mention Hey or the cancellation anywhere after the PG paragraph.
Guess my language limits got me there.
Still very hard to understand and I find hard to say it would be worth reading. Apart from the Gemini-like looking template.
But that doesn't mean it doesn't originate somewhere else. Looking at Obsidian, it seems to be an ideal training source for pairs of Markdown and HTML/CSS.
But I don't wanna insinuate further, it's a summer evening and I made it outside. Have a good day/evening/night'