Complex, no. But many other things than complexity add to the cost of making something and a lot of those do not scale to higher volumes in any way like complex

Complex, no. But many other things than complexity add to the cost of making something and a lot of those do not scale to higher volumes in any way like complexity does. Indeed cost-saving innovations often increase complexity in order to reduce those other components of cost (the hoops engineers wind up jumping through to save fractions of a penny in high-volume products is crazy. For a mild example, having a full network inside a car increases the complexity drastically, but decreases the cost of making up the wiring in the car a little)