Whenever someone tries to do something similar in markdown, they have to invent an extension of markdown to do it.
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.
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.
Yeah, but if this kind of social network was hosted on Vim, nobody would be able to exit it I guess.