IanC: homo sapiens is a great innovator. if there are fancy chords to be found on a D/G poker work, people will find them and use them(appropriately or not). Neanderthal people, on the other hand, were quite content to use the same kind of flint knife for 100,000 years, and are doubtless still wheezing out Winster Gallop with a monotonous um cha on the G pair of bass buttons.