Two questions about mesh networks: 1. at some point there will be an expensive hop across the ocean, or between cities, that will likely only be built once, th

Two questions about mesh networks: 1. at some point there will be an expensive hop across the ocean, or between cities, that will likely only be built once, then shared. Won't whoever owns that hop have similar centralized control of any non-local traffic, similar to an isp? 2. how meshy should mesh networks be? On one extreme, every computer can be directly connected to every other computer in the world. On the other, every computer can be connected to just one neighbor, and requests are routed through many hops. What is the prevailing wisdom on the optimal amount of peers nodes should have on average in a mesh network?