The only thing I dislike about Textile is that it treats line breaks in the source code as <br> when it renders, which makes it annoying to edit in vim. Markdo

The only thing I dislike about Textile is that it treats line breaks in the source code as <br> when it renders, which makes it annoying to edit in vim. Markdown is nicer in that one aspect. Otherwise, Textile is better (so of course it lost the popularity contest).