Thanks Sylvaticus. There’s a reason it’s done that way now, and it’s primarily for very heavy forum users and moderators. Here’s the rationale:
There’s a ton of traffic and new posts every day on this forum: too much to keep up with really, even with ignore boards turned on. That said, let’s say you’re absolutely uninterested in anything to do with, say, Ditto and Wayfinder. Since they have their own categories, you can skip over those quickly and get to the topics you’re interested in fast. (An alternative is to find the categories you’re uninterested in, click the category, mark all read, then return to the unread topics list):
The "new" icon will take you to the first unread post.