> Like, being able to write scripts, have figures and custom styling, populate data from JSON files, plugins, typography, numbered sections, footnotes and all sorts of other stuff. Markdown doesn't even support comments properly!

it is plain you want typst or latex and not a markdown or any other so called lightweight markup - and you were lying about footnotes, figures, numbered sections, and depending what you meant, a number of other things.

It completely violates the concept that you are doing 'custom styling', typography ... you might as well add launching missiles, calling a C compiler, etc. Why not use microsoft word? I find markdowns irritating in many ways -- only those are not among them. Why would I want an intellectual document to be in a programming language?