No, I'm afraid it's the format I know I don't need. At least not for the kind of things I usually use markdown for.
Readme files, technical documentation, moderately complex websites with templating and rendering engines - markdown works just fine. Sometimes with a custom `|||warning\n...\n|||\n` thrown in to render something in a box with a red border.
I get that there's a market in the space occupied by TeX, Typst (underrated IMHO), and possibly MS Word or Quark Express (for non-techies). Libreoffice is great in theory but, again IMHO, "eh" in practice. That market is generating book-length documents with all the cross-references and other features that needs.
That said, Robert Nystrom of "Crafting Interpreters" managed this just fine with markdown and a few custom scripts: https://journal.stuffwithstuff.com/2020/04/05/crafting-craft... , https://github.com/munificent/craftinginterpreters/tree/mast... . This is how those famous 10x writers/programmers work, I guess.
Asciidoc is Markdown's big brother? I'll carry on playing with the little brother, thank you very much.
Also the whole page is an ad for their own editor tool. $9.99 per month so you don't need to use your own editor and unintuitive tools like (gasp!) the terminal.