There's a school of throught, prevalent at the last Emacs conference (See Karl Voit's talk), that Org is also a notation/markup. So-called "org-down" has been put forward with foundational semantics, headings, lists, emphasis and other basics.

https://karl-voit.at/2021/11/27/orgdown/

I'd actually love to see Gemini and HN adopt orgdown. Just sayin... :)

Thats the cool thing about org, its not just a great outliner tool and the best markdown, it also covers the full gamut of productivity and personal knowledge management functions (todos, calendaring, linking etc).

That said, what would it mean for HN to adopt orgdown?

It means one can use the orgdown syntax when writing comments.