As an historian and author, I greatly appreciate the revisiting of old threads, most especially for the addition of new information, correction of old mistakes (ALWAYS a field rife with opportunity here) or to ask questions in order to encourage better understanding.
Admittedly there are times when revisiting an old topic is not only trying to spur on a dead horse, but the corpse has pretty much rotted away.
This site is a delightful mix of pretty much all the above, and delves into subjects which I would never think to research (and still won't after reading about it here, but still interesting!).
I encourage this discourse, no matter how wrong, out of left field, or out of place.
Well done, chaps!
AlanG