> So how is (X) better? For sure Markdown has some cruft but isn't it better to improve Markdown itself than to try to "establish" a completly new format> PS: See Text with Instructions (.texti) for a (better) Markdown evolved variant / flavor
You have answered yourself: markdown is not a language that can be improved, it's a mashup of several different slightly incompatible implementations, much like HTML in the early web during browser wars.
You could try to create a standard body that defined a homogeneous definition that everybody adheres to and which could be extended with new features.
But by that time you'd be better served off by using asciidoc, which already did that job and which is actually based on Docbook, supporting all the features of that complete standard for book publishing.