Well I certainly don't think I am a "Cave man", and I have never feared change. I pretty much live to modify and improve parts and pieces that other consider just fine. I am not afraid to spend money, lord knows that as I spend more each year on parts then most spend for house payment, car payment and utilities combined. But what I don't do is change something that works just fine, for something else that is not as good. I see know advantage to the oil drain cock, it sits lower and is more vulnerable to road damage then the stock oil plug it replaces. It takes longer to drain the oil pan and it has moving parts to vibrate loose or leak. The stock unit could not be more efficient, it has nothing to shake loose, can not be easily opened to allow the oil to drain by accident or by evil prankster. The stock drain plug sits just below the oil pan, not several inches below where it is exposed to damage, and their is no danger of cross threading or striping the stock plug if you posses a minimum amount of intelligence, and take your time while re-installing the plug. Also, realize that the drain plug has a sealing washer under it and needs to be re-placed every once in a while. These are easily purchased for mer pocket change at any deal ship.
You are free to buy anything that comes to market, good bad or in between, but don't try and sell something on the basis that it replaces a defective or troublesome part when it doesn't. The stock oil drain plug works just fine, and does not need replacement. What you are selling is convenience, for some it might make the oil change easier, but it does nothing to make the oil plug better. I do not live in the ice age, but I will continue to use my old oil drain plug and be happy.