Part of the beauty of SO compared to an actual classroom is that the more open-ended discussion going on in a different question wouldn't keep your question from getting its straightforward answer. It would be read just by the people who found it interesting, instead of taking up shared class time.

I don't think the jargon question example from the article here is well suited for even a looser SO, as it's more entertainment than education, but there are lots of productive questions that don't have black and white answers that I've still enjoyed seeing SO discuss.