(Sarcasm noted :-) For the uninitiated, this was around the time comment scores were hidden. Only PG knows whether this had any real effect on traffic; and even if so, whether that's a good or bad thing is subjective (less poor quality traffic / comments is good, and since HN is not directly commercial, lower traffic is not necessarily a bad thing).

Loss of value to everyone else from lack of comment scores is another question entirely...