[twobjshelbys]

There are some threads that can safely be resumed after a period of time. Starting new threads where an existing thread exists happens frequently. The result is a discontinuity of content and often repetitive content. It would be better to continue an old thread than to come into a new one and say "see thread x" it's already been discussed.

Regarding whether to kick an old thread it's a matter of whether the new content adds additional value. Simply adding a comment that says "I agree with that 5 year old post" adds nothing.

I believe that in the forums these days most people read by using the "new posts" button. So along the same thought, it's hardly ever necessary to post the same content twice in two different subforums as if one doesn't get ignored, you end up with content either duplicated or bifurcated...