I want to know what the "official" definition here is, of "extended discussions", because when the comments under an answer are being used to further troubleshoot or gain relevance to said answer, and then some moderator moves the comments to a chat, making it more difficult to discuss because you now have to flip back and forth between the main post and the chat, trying to correlate between the two. If the comments are actually being used purely for conversational purposes, I'm in agreement with moving them to chat, but when they pertain solely to the answer or original question being asked, I think they need to stay with the main question.