Healthy debate has been dwindling on a number of threads for a while now. For me it seemed like many of the threads were weighed down by all the baggage that's been developing over the years. No comment, statement or argument are debated on face value. The sequence is rather: who is making the statement, why is he/she making the stament, what is his/her hidden agenda, etc... What could be a very interesting debate very quickly digress into personal attacks and accusations.
Still sad to see threads being locked outright though.