Comment by uyzstvqs

Yggdrasil can peer over the internet, but that's just convenience. In a global internet blackout, you obviously wouldn't have a global Yggdrasil network in a week, month or year, but you can have a reasonable regional network in that time. Every user is a node and can expand the network to new people. It's a P2P mesh, not volunteer-run. As regional networks start to peer to each other, it forms one big network automatically. You need cables and hardware, but that's not a problem when everyone has the incentive of wanting to use it.

You could build a public network over Reticulum, but why deal with the inconveniences of the protocol just to run it over high-bandwidth? It's specifically optimized for very low-bandwidth transports, so that you can cover long distances with just a small group of participants.