And that's exactly where the whole "have two backbones managed by separate teams instead of one" stops. If someone pushes out an incorrect network config to the

And that's exactly where the whole "have two backbones managed by separate teams instead of one" stops. If someone pushes out an incorrect network config to the end box then all that "let's have two of everything" becomes completely worthless. And as far as multihoming everything and having every single box on the network act as router, unless you are running a CDN of some sort, really makes zero sense. You seem to be arguing that adding more complexity will automatically result in better reliability.