Yeah, I got the impression that Reticulum's main claim is that it replaces the IP stack with a future-proof, encrypted protocol for routing regardless of the underlying network medium. Which is not an insigificant claim to test, but boy would it be fantastic.
Would say your understanding is correct. It uses something similar to a "gossip" protocol where the public keys of other users are advertised.
So it gets ride of IP addresses and can jump boundaries between different network types. I'm using it for BLE to BLE communication, I've seen videos of people using it for USB to USB communication. There aren't many limitations as long as data can flow.
> I've seen videos of people using it for USB to USB communication.
How would that work? Do you have a link?