My 2 cents,

I agree that the site is a little dated, but I do not think that has much to do with a decline in use.

I also think that with the current traffic, I would prefer is consolidated into just one or 2 sections. Some of the other sections have no recent activity at all other than spam. Its mostly all the same group anyways lets lump all Tech together and generate more traffic and conversation on them.

If I posted an A-class question in that section now, I have my doubts on it being seen by more than 10% of the people here.