Comment by Kirby64

> Sure, 40gbps isn’t needed for all cables, but is some piddly 5gbps too much to ask?

5gbps means you add 8 additional wires to every cable, and also would require that both devices on each side implement 5gbps PHYs for their USB (if you mandated it on devices too). It’s a large cost, especially when you’re talking about billions of cables.