I think most people do not have 10g UTP infrastructure they want to exploit, but many people do have 2 computers they'd like to connect together at high speed, and these people are far better served by just connecting those computers' Thunderbolt ports together. With nothing other than an admittedly pricey cable, you get 10, 20, or 40gbps links depending on the endpoints. That's the "something faster" that will work well for most people.