Stackoverflow is, at some level, genius, yes! But the core UX of putting in a question or answering one, is a blatant, mighty train wreck when it comes to UX. If you ask me. And not the kind of train wreck where the train was a freight train carrying soap bubbles or jelly beans or tribbles or free flu shots or gideon's bibles where everybody would come look at the train wreck and be able to walk away with a happy feeling. Nor a train wreck that was full of oligarchs we'd be better off without. No, a train wreck where the train was carrying nothing but, I dunno, human excrement or something. I mean how can just being able to put code into a question or answer be such utterly fubar UX? You know, it isn't as if that is a core competency the UI should succeed at or anything.