I feel like ChiefDelphi is already populated enough as it is. The forum style is better for general open-ended discussion as are the majority of robotics-related discussions. Only thing I see a stack being better for is answering general electronics/programming/etc one sentence questions, but there aren’t many so it might not get checked as much by the people who would be able to help.
An interesting idea, but unfortunately it seems like most of the sites that launched from the staging zone averaged over five questions a day when released. That kind activity might possibly be achievable during the peak sections of build season, but I am not sure how sustainable such a site would be in the long-term.