Also, CommonMark failed? News to me. Last I heard it was still under active development, years after the drama with Gruber.
I do, when he has abandoned his project's raggedy implementation yet defends the trademark viciously.
Given this news from GitHub, it's very exciting.
I suppose since one of their goals was to get Github and StackExchange 'out of the markdown business' but neither use CommonMark, and further, Github now has put work into creating their own spec, they failed in that aspect.
A big aspect of the post is talking about how GFM is now a set of extensions to CommonMark. This is a huge win, not a failure.
FWIW, StackExchange [uses CommonMark][1] for their new StackOverflow Documentation site and has [been planning][2] to migrate Q&A to CommonMark for some time now.
[1]: https://meta.stackexchange.com/questions/125148/implement-st...