The implementation is clever, but. But. Does it do the one damn thing that no other MarkXXX dialect properly supports: poetry? by which I mean, can you have a text block ("stanza") in which each line is a block that has full formatting (i.e. do not try to pawn me off with a code block!) but in which white space if fully respected (i.e. arbitrary indention is retained), and the ability to right-align an annotation ("line number") is available?

And can you use it to write a play script (see any copy of Hamlet) and/or a film script?