Perhaps someday, but currently HB has modest traffic and a manageable ~30 posts per day. The advice I've read from successful forum owners consistently says to keep the number of forum categories proportional to traffic. A rookie mistake of young forums is to create too many categories of which most languish with only a handful of posts. I follow the
phpBB discussion forum and see it all the time (e.g., 30+ categories with a few hundred posts spread among them).
BTW, I am looking for ideas on keeping good discussions from getting lost. The
FAQs and Favorites is a good start. On the other side of the equation, archiving older threads with low view counts is possible, the idea being to keep the quality of search results high. (Speaking of searches, I ask myself why isn't the default "and" like every search engine on the planet... need to change that, and the default results to posts, not topics; the latter makes sense with HUGE forums, not small to medium ones).