How does this compare to RST, which also claims to solve specific MD inconveniences?

In researching for this reply I see that it's joining a somewhat crowded field https://en.wikipedia.org/wiki/Comparison_of_document_markup_...

Indent for code blocks is a non-starter. Can't paste easily, very annoying to type in a web form. Triple backticks is the right thing.

The text file looks great, but reading this just makes me think of the XKCD standards comic. Markdown has very few issues, and the remaining ones are so nitpicky that the downsides of having an additional standard are larger than the benefits.

On the other hand, I am always happy to see progress in the LaTeX alternatives world. That typesetting language has become comically overgrown and I think it's turing complete at this point.

Leave markdown alone. Focus on JS frameworks and harnesses please.