It is impossible to quantify, even for alumina1's great efforts, where ORT's product streams will be used; only that current world demand is a pittance being constrained by supply and price.
PS Glenn, scary business you outline. My first thought reading your post was: How does unprecedented central bank intervention distort any prognostication. Uncharted waters are notorious for wrecking predictions and models. Always remember, the "discovery" of the Americas was a BIG mistake, India was the prize!