There used to be a question about popular programming blogs. To me it looked like a good and popular question, so I asked a similar one - which was then closed, because by then the consensus among the mods had moved on to discourage that kind of question.
Which brings us back to the original question: why isn't it welcome. Yes, I understand the very real requirement for SO to drift towards a forum, but I think they've drawn the line very far from the optimal place. Furthermore, the insane success of SO has largely killed off specialized forums where that type of very valuable conversation formerly took place. I wish SO would introduce a discussion forum site or "layer" (integrated into SO itself in some way).
Jeff's motivation for SO was something along the lines of making the internet a better place - in my opinion, many of the current mod's actions are contrary to that initiative. SO is still a massive net benefit, but it could be better with a little common sense.
"Update 2: Thanks to the Hacker News community, the post has now been reopened!"
One would hope it would prompt some discussion and soul searching, but I expect not.