Progress ? Debate ? Forgive me but it seems more like some sort of pi$$ing contest.
The bottom line is that the decisions will be made by bean-counters based on which manufacturer's marketing team provides the best fairy-tales regarding capabilities and DOC's.
However, I'm ever mindful that spirited debate in a forum such as this could somehow change the world so keep at it.
Can't wait till we get to the bit where "our paint scheme is better than theirs".
STL