The blog post summarized the most important changes.
You are the hero we needed, today. Thank you
@dang
This doesn’t do anything.
Yes, it does. It triggers some people who then post a reply to write an email to hn@ycombinator.com
This site doesn't even fully support Markdown or Unicode and people think for some reason that Twitter-style username tagging will actually work. U+1F923
I don't know, the comments did get moved ¯\_(ツ)_/¯