I gotta tell you, years ago when the forums originally split into all the sub-forums, I was ALL for it. I thought it would be a great idea but in practice I've found it's really not.
I'll explain (what has already been explained ad nauseam, but w/e, it's a +1 I guess)
1) Traffic. This site just does not have enough activity to warrant gobs of sub-forums. Look at the mess over at [H] for a fine example.
2) Drama. I mean who doesn't enjoy a bit of drama? "YAGT" or fanboi drama for examples. Once this stuff is split up, not as many people view, or interact at all with these threads, leaving only the most hardcore arguing amongst themselves.
3) I have a few friends on this forum and "the good ole days" has been brought up often. I honestly just don't think to click on "Love and Relationships" that often and I'm sure I'm missing tons of great "YAGT" threads that we all (well, most of us?) enjoyed in years past.
4) This one is tough to quantify. I guess with just so many sub-forums, it's just pretty lonely most of the time. Just not as many eyeballs on as many threads as there should be, IMHO of course.
I know the mods here have a tough job. The rules are so tight and consistency can be tough, but they are all trying. In my opinion, in addition to fewer sub-forums, the "personal attack" rules should be slackened somewhat, both to give the mods a break, and to make heated discussions slightly more interesting.
Just my $.02