I guess the main takeaway is that programmers like to ask questions and answers on StackOverflow because it's very helpful and popular. Even through newsgroups and other forums existed previously, StackOverflow is taking it to new heights by making it easier to ask questions and get answers.
Also, the site admins have cultivated a peer pressure of having answers/questions in good English on the site forcing people to sit down and formulate their typing instead of bashing the keyboard like it happens on other programmer forums. This is similar in effect to the editorial guidelines on HN, the same link on Reddit gets a very flamebaity headline whereas it's pretty tame on HN because of peer pressure.
Also, the site admins have cultivated a peer pressure of having answers/questions in good English on the site forcing people to sit down and formulate their typing instead of bashing the keyboard like it happens on other programmer forums. This is similar in effect to the editorial guidelines on HN, the same link on Reddit gets a very flamebaity headline whereas it's pretty tame on HN because of peer pressure.