I assert that TCP/IP is actually the cause of "[lack of] physical diversity of connection in any one location". A second (or third) ISP isn't going to suddenly

I assert that TCP/IP is actually the cause of "[lack of] physical diversity of connection in any one location". A second (or third) ISP isn't going to suddenly show up at my house because it doesn't make economic sense. In the same way that two railroad lines don't get built between the same two cities. A real scalable mesh protocol could change the economic calculation.