I think I do Fred.
Maybe a serious chat/debate board, sub board

I think part of the problem is more about how people use the chat board, a tendency to bicker, stir up arguements or take offence at a subject/post have not helped but in the main it does what it was intended to.
Could it do a better job?
how I guess is the question.
PHO has evolved over time from a small start to the size it is now with over 10,000 members. I think your point has highlighted that the chat board whichstarted as an informal place with only a few users and is now trying to accommadate many more and we may need a rethink to give it a broader range of uses.
Will need some thought
Tim