Quick google, of the four available wires, two are data, two are power. Must be cheaper just to leave out half the connections when producing at scale and plenty of things only need power. But things that need data transfer are highly likely to also need power.
Quick google, of the four available wires, two are data, two are power. Must be cheaper just to leave out half the connections when producing at scale and plenty of things only need power. But things that need data transfer are highly likely to also need power.