If the internet were to go down, experts (perhaps like yourself) would definitely work on building local IP networks for their local communities. The cool thing

If the internet were to go down, experts (perhaps like yourself) would definitely work on building local IP networks for their local communities. The cool thing is that with P2P tech like BitTorrent, you can have edge nodes connected to multiple such networks at once. Edge nodes can then download a torrent from one network, then seed it on all connected networks. Wireless mesh networking also exists but is complex, unreliable, slow and high-latency. Not to mention there isn't an established standard like there is IP/TCP/UDP.