I have found that Guthub markdown is a heck of a lot better than markdown.  In fact, it's so significantly better that I don't see why it's not merged into markdown yet, except that as far as I can tell markdown proper is unmaintained.  

The existance of Github-markdown reinforces my point:  markdown needed fixing.

But I agree; sometimes docbook is overkill and [github] markdown is a better choice. If I didn't say that in this or my previous episode,  I did mean to, but maybe I was blinded by docbook passion.