alt Hacker NewsAs I said in a previous comment typst especialy with extending via scripting stops being plain text readable. A Markdown file (whatever flavor it may be) is still fundamentaly one vi,nano, Editor, Notepad++ away from being read with all its context included. It is a tradeoff that for READMES I would not want to make.
If you restrict typat to the basic functionally of markdown it is just as readable as plain text (not surprising considering that typat syntax was inspirered by markdown). However, once we include more unusual things I would argue that markdown becomes more illegible than typst (as for markdown you start adding html essentially).