> Search for iroh, or DynDNS for example

CG-NAT breaks all this. iroh relies on relays from people with non-broken internet (no CG-NAT).

>iroh relies on relays

Yes, and DynDNS too. Which is fine, cause it works, and that is what I said. The claim to which it replies is that people have to pay to Dropbox cause poor souls were stopped from sharing files using existing technologies like FTP by the damned IPv4, and not because they simply prefer an out-of-the-box GUI thing.

There were out-of-the-box GUI experiences, like Apple's "Back to my Mac", that never worked right because of all the issues with poking through NAT caused by IPv4.

Relying on peer-to-peer relays also doesn't scale, which is why Skype dropped its supernode architecture.

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