Regarding Stack Exchange, I understand (and agree) with your view that there are lots of verticals it won't work in. But do you think programming is the only ve

Regarding Stack Exchange, I understand (and agree) with your view that there are lots of verticals it won't work in. But do you think programming is the only vertical in which it can work? My view is, the model will work well for some places, badly for others, and that's perfectly fine - for the places it works well, it works really well. For the others, other solutions will be thought up.