Have you thought about what such an architecture would mean bandwidth-wise on a WAN network ? I mean, dear God. This would actually require MORE links than full

Have you thought about what such an architecture would mean bandwidth-wise on a WAN network ? I mean, dear God. This would actually require MORE links than full mesh. In other words, core network capacity (meaning total bandwidth in all links) if you have a clos scales even worse than n^2, with n the bandwidth you deliver to users. Even worse : you need as many long-haul links as you have subscribers (because your subscribers are connected to different locations). Is there question in your mind as to why ISPs don't do that ?