Yep, but I can't remember the difference between Chrome Markdown, Firefox Markdown and Edge Markdown. - me, in the future. I have a hard enough time with GitHub Markdown and Reddit Markdown, as it is.

Obligatory: http://commonmark.org

That was a jab at browsers and their history of not supporting specs identically. HTML5 is also a "strongly defined" specification and it didn't help.

Looks like fenced blocks are part of the spec - will you be adding them to SO?

codinghorror no longer works at SO

http://blog.codinghorror.com/farewell-stack-exchange/

Perhaps what we need is a registry in which we can store (functional) descriptions for converting markdown variants to e.g. HTML and back.

Yea! Great read.