Yes. Stack Overflow isn't magic. I think they succeeded because they focused heavily on SEO, which brought both ask-ers and answer-ers to the site.
Personally, the "accepted answer" is the killer feature. Dunno if NodeBB, Kbin, or others already support this.
There's potential in SO's gamification aspects, too. I'd love to let third-party sites to award badges or "endorsements" and display them on my profile page. This could work in all kinds of trust/credibility situations.