Does anyone else think that underground tunnels are a superior way to solve the last few miles problem? Tunnels about 1 foot in diameter with little wheeled vehicles pushing around payloads of takeaway food, groceries , parcels at reasonable speed with control computers determining routing and stopping collisions. A functioning network of this type would be more valuable than power or cable utility networks, and horizontal tunnel drilling tech means that you dont have to dig up huge swathes of road to put tunnels in.