Well, perhaps. The amount of gunk stays the same, so the diaphragm gums up quickly and becomes the “bottleneck”. Nothing is 100% efficient, so what is the performance hit with a diaphragm? The point here is that air is only required to lubricate the lips, allowing the standing wave to modulate it. In addition, The lip tension and airflow are in equilibrium. More lip tension needs more “blow”, that is how we go up in the partial series.