Curiously, I would argue exactly the opposite.
In general, I think these support boards go *WAY* overboard in creating millions of "sub-forums". I participate in several of these forums and this is what I've (almost) always observed. I don't see the benefit.
Here's a real world example:
Another forum that I participate in, has 45 (!) sub-forums. I mean, they really went all-out to create a subforum for every possible area of interest with respect to their product. But this just creates a mess for me, since nearly all of the posts are "It doesn't work; help me!". It doesn't matter what the specific area is, it all boils down to "It doesn't work; help me!" and, in fact, the answers are almost always the same - again, regardless of what specific area the poster happened to post in. (This is a new product, with a bunch of super-newbies; the answers usually boil down to "Is it plugged in?")
As a helper on that board, I try to at least read (and usually respond to) every "Help me!" post, but (obviously) I can't really monitor all 45 forums individually for all the "Help me!" posts. Luckily, there is a feature on the board that selects all "Unread" posts, ignoring forum boundaries. So, this is how I always read that particular board - with the effect that I usually don't know (or care) what sub-forum I am actually reading/posting-to. And it works well, except that every once in a while, someone will chide me that my response wasn't quite appropriate because "This is the XXX sub-forum and your response didn't take that into account." Minor annoyance, but it does happen.
Having said all that, the thing that does bug me on this board is foreign language posts (this is a very international product, although most of the posts are in English). Not, of course, because I have anything against people speaking or posting in other languages, but I can, unfortunately, be of no help to them. So, if I were king, I'd throw out the 45 forums there and replace it will just 3:
1) Help (English)
2) Help (non-English)
3) Off-topic (everything except "Help me!").
If this were done, I'd only follow the first one. Again, not saying there's anything wrong with the other 2, but they just don't interest me.
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Needless to say, I believe that my little tale of woe has something relevant to say about the direction that I think we ought to take here on this board.