Seems everything that isn't a direct question/answer gets closed. Seems like they miss an opportunity with the discussion questions. They have really smart community that can't really converse on the site of something doesn't fit into he narrow question and answer definition.
That's the whole point of StackOverflow. It's not a discussion platform. It's a Q&A platform. You can dispute whether that's a good idea, but they know exactly what they are doing.