The thing is though, of course we will be repeating threads which have already been discussed. The person who started the thread probably wasn't around when it was discussed.
I don't like this idea that we should be forced to plough through archives just in case a subject has ever been mentioned before. People come and go. MN is a living, breathing site and I love it for that.
If I see a thread which I've already done to death I simply don't go on it but I think it's a bit unfair to critisise people for starting threads which have already been covered.
Some people don't spend 8 hours a day on MN.