I voted to merge. Answerhub always seemed like a ghost town to me, even in its earlier days when things were more active. I think because of the fact that it was separate from the official forums and was plagued with login issues it caused people to use it less.
I myself would generally find myself answering questions here more so than on Answerhub simply because of ease of access. I can make my rounds to my usual topics and then check on new threads to see what people are posting or having questions on and respond accordingly.
Then you have the communal aspect of it. On a separate site that’s strictly focused on Q&A, it feels a bit more singular in focus whereas incorporating it into the wider community discussion channel I feel it might encourage people to participate more.
Another somewhat related thing that would contribute towards learning and solutions is signatures. Or better yet the information they contained. While there are parts of the forum that are hubs for information, many users used to be able to point to their signature for links to tutorials, documentations, videos, or other useful information. In other cases forum users could simply happen upon something useful by chance and get it from there. I’m not sure where you guys are in regards to getting signatures back up and running, but if you plan to go according to how this poll is trending and blend the two experiences, I’d strongly recommend getting that feature incorporated again as it helps significantly in disseminating useful information.
That’s just my 2 cents on the matter anyways. =)