Folks who say stuff like this aren’t taking into account the number of real world constraints on networking at a large scale. There are bandwidth, reliability, security, management, cost, and performance considerations behind the complexity, just as there are at other layers of the stack. Folks higher up the stack want a simpler abstraction, but you can’t short-circuit physical limitations with a unified IP space.
To take the first property you mention, as an example: How do you feel bandwidth is helped by the proxying / NAT approach compared to traditional IP routing and Internet addressing?
