[fhd2]

The problem is the knowledge encoded in the models. It's already pretty hit and miss, hooking up a search engine (or getting human content into the context some other way, e.g. copy pasting relevant StackOverflow answers) makes all the difference.

If people stop bothering to ask and answer questions online, where will the information come from?

Logically speaking, if there's going to be a continuous need for shared Q&A (which I presume), there will be mechanisms for that. So I don't really disagree with you. It's just that having the model just isn't enough, a lot of the time. And even if this sorts itself out eventually, we might be in for some memorable times in-between two good states.