I will agree that advancement in bow technology will allow bows and their components to withstand more energy without failing.However the excess energy means more noise and vibration.Also the lighter arrows are less efficient.It gets to be a point of diminishing returns.Superlight arrows will lose energy and momentum at longer ranges.For target archers that is not a big deal.For bowhunters it can be.I still think it' s a cheap marketing ploy by HCA,speed sells.And just think people used to kill critters with a sharp rock tied to a stick.One more consideration in regards to bow technology advances is the perception by gun hunters and wild life mangers.While a bow will never be the equal of a high powered rifle,as technology advances it becomes harder to justify special archery seasons and bag limits.A lot of gun hunters are jealous of the early seasons bow hunters enjoy,especially for elk.The perception of archery equipment as a primitive weapon gets harder to justify as technology advances.

CB