"The most lucrative market in bicycles isn't cheap commodity bikes like Schwinns"
Do you have references for this. In most markets it is the low end that contributes the most to the bottom line simply because the volumes are magnitudes higher than the high-end.
"Besides, if adopted, economy of scale would drop price dramatically"
Of course, economies of scale will in practical terms mean replacing the printed parts with injection molded parts. Economies of scale isn't magic. In practical terms it means you can afford to pay larger up-front costs to get to more rational manufacturing. Consider SRAMs XX casette. This part is milled through a time consuming process while other casettes are stamped. SRAM will not be able to simply push a button to manufacture more XX casettes and then get them cheaper, it is the more rational manufacturing that leads to economies of scale, not the other way around.