IPV6 addresses are still addresses. They get assigned to your device, and change as you change networks.

Iroh addresses are (currently Ed25519) keys. They are not scarce, so you can create them on demand and keep them as you move from one network to another.

If IPv6 was everywhere I guess the hole punching feature of iroh would become less important, but the dial by key feature would remain just as important.

IPv6 solves a lot of it, and maybe in another 20 years we can rely on it.

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