The article doesn't make sense. It can technically work with a bunch of dynamic DNS systems. An IPv6 address isn't fixed to your device like a MAC address is. Even assuming it would be doable, it would be a security nightmare, and we'd end up relying on some centralised systems anyway lest we burden the internet with absolutely insane amounts of continual p2p discoveries. If you want a personal website, why not use a…
I'll add that Resilio Sync + singlefile Tiddlywiki (I think most people would be surprised what TW can accomplish) from a phone is quite workable (a filewatcher with ratox or may toxic, or IPFS, would do as well, but they aren't as performant or turnkey). You can automatically push with custom conditions (or manually do so) to those listening (the burden has to be shifted away from the phone to some degree). If you have persistent seeders in the mutable torrent swarm, it's even better. That would serve a very large number of people on the planet pretty well, imho. This is harder to anonymize on a phone, but also doable.
It's reasonable to do both, too.
Add a proper USB to boot with, and it would sometimes be easy enough to walk up to a random machine when you need more than a phone to work on your Tiddlywiki or other infrastructure. I admire trying to find ways to make sure almost anyone can participate in The Great Conversation with minimal material; it's an important problem.