An idiot can build a Clark Y wing; I know, I have built many. Building an undercambered wing scares people; they invest time they dont want to worry. Clark Y will always be king just because of that. It is still going to fly better even if the better is not all that better. It is the airfoil they learned how to fly on. If your hand cutting ribs, half the rib is done with a straight edge. All it does is separate the men from the boys. Cessna airplanes hold their value not because they are better planes than others; its because 99% of modern pilots learned how to fly in one and they are too scared to move to something different. Not bad planes but a 172 will sell for equal or more than a M20C-E Mooney on average even though the Mooney is faster and has retractable gear. The Y is the comfort food of airfoils.