A 4/5G base station setup uses from 1 to 3kW. That might be very little pr. user. Fiber is very power efficient since it only needs powered equipment on each e

A 4/5G base station setup uses from 1 to 3kW. That might be very little pr. user. Fiber is very power efficient since it only needs powered equipment on each end and the fiber itself is passive (over extreme distances, 100km+, repeating might be needed but that's almost exclusively submarine cables). POTS/Copper (xDSL etc) are not very efficient since every active (as in available, not as in being used) line needs to be powered on 48v. In my experience HW is usually either renewed to get energy savings or because it does not meet demand anymore. A network is most often designed for more demand than is expected so it's usually about energy savings. With P2P there would either be the same requirement for networking HW or possibly more. Demand for bandwidth would not decrease with more P2P usage but rather diversify (likely requiring more interconnections = more HW).