See the official blog post:
and once again a huge list of changes:
I also re-enabled the tagging, ReplyGIF selector and ImgFlip meme generator plugins since the had broken at some point in the interim of stable releases. The new plugin architecture of discourse might help with compatibility, we shall see!
Badges look more fun:
How about the new “User Summary” feature!
Please let me know if you spot anything odd around the site but so far it seems nice and stable. Enjoy!