Where I used to start at 'Content' to see latest posts/active thread, it seems individual top level topic forums are gone, and the forums are now tag driven, especially if you intend to casually browse, versus say, search.
You can go here, then drill down into your choice of topic based on
Tags: >Main List/top level is here - they are listed alphabetically, and there are tons of them, from
Accelerate to
Zsh - (
interesting the links for them cannot be included in a comment...).
Have to wonder how many questions are going to drift into a black hole, unless of course they make good on their +1k engineer participation promise and that need is met head on.