It allows real computer scientists to laugh at stupid webdevs reinventing the wheel. </sarcasm>
(Except no one was claiming that it was a novel idea, just that in the past, most Markdown processors just convert directly between Markdown and HTML, but now they are changing that. It's also funny that there seems to be some animosity in that post towards Ruby programmers for whatever reason. It's not like Markdown is an invention of Ruby, the reference implementation was written in Perl.)
(Except no one was claiming that it was a novel idea, just that in the past, most Markdown processors just convert directly between Markdown and HTML, but now they are changing that. It's also funny that there seems to be some animosity in that post towards Ruby programmers for whatever reason. It's not like Markdown is an invention of Ruby, the reference implementation was written in Perl.)