HTML is the compilation target, the low-level markup language that Markdown, reStructuredText, &c. can render to.
Compare:
<strong>important</strong>
@strong{important}
For big sections, one could use @begin{blah} content here @end{blah}.
It looks a bit plesant in my eyes (than html). And only _one_ special character @, which is repeated twice to escape it.
>> All you're doing is fracturing the ecosystem needlessly.
I haven't done anything yet ;)
HTML is the compilation target, the low-level markup language that Markdown, reStructuredText, &c. can render to.