Sounds a bit like the idea that Bluesky started out with. I don't really get why specifically org mode though, sounds like you could be doing the same thing with a simple Markdown file. And while you're at it, why not just use HTML and read your friends' blogs in the browser?
Markdown really isn't a specific thing with all the incompatible implementations, many of which allow embedding HTML (i.e. "whatever happens to be supported by current version of Chrome" is also part of those Markdown formats).
If you pick one of the more sane (or at least less insane) variants of Markdown, like Pandoc's variant, you do get at least some ways to embed data in reliable ways. It also makes it easy to export and style documents and write your own filters that can make use of the data in various ways. In general I prefer to use ORG-mode, but for some purposes I use Pandoc Markdown instead.
Because that would require leaving emacs, I guess.
Just a guess. I'm a Vim user so unlike emacs users I do know how to shower but like emacs users I can't manage to carry a conversation with someone in person. We only think partly alike.
I meant 'less markup' (in the sense of a simple ratio of markup characters over total characters). Now you can say that the markup is still fairly low and actually useful. But that goes to my second point of why not just use HTML. This is pretty much exactly what it's been designed for originally.