[ogurechny]

This is something a clueless TV marketer would say, I suppose.

Both tools can be used to both build private networks managed by a single entity, and to connect to global shared volunteer-run network.

Reticulum is not a general purpose protocol-agnostic data transfer network into which you can plug anything. Also, when you want any kind of serious bandwidth over long distance radio, you have to meet with agencies managing national frequency plans, and they won't lease you anything for free.

Yggdrasil is hardly an “alternative to Internet” as long as it runs on top of Internet links. Moreover, when public Yggdrasil network becomes big enough (assuming that it still runs on volunteer public nodes, just many more of them), the core of the network will have to form a backbone with links shaped by user concentration and user traffic flows, just like network of physical cables used by providers is shaped by demand, concentration of computing resources, geographical features, and so on. Someone will probably have to collect funds to pay for that. Or some new smart multipath routing with dynamic load balancing will be invented.

[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.