It may be that 20% of the people do 80% of the posting???
I'm finding that I have less and less to say - I'm with the others in that if the question has been answered six different ways with most of the answers repeated at least twice - I'm not going to add to that thread.
I understand that what may be "new" to someone else is "old" to me. And vice-versa. There is usually something to comment on, though.