Blockchain does not by itself solve identity. You can build identity solutions atop a blockchain, sure. But “built as a blockchain” does not at all hint towards your blueprint to solving this problem.

That's the same for other alternative distributed name systems like DHT based naming. For example, how should the DHT be bootstrapped, should there be any universal root zones, etc etc. GNS and IPNS are both DHT based naming systems which make different choices, much like there are various blockchain based naming systems out there.

Anyway my understanding is that Bluesky uses DIDs for exactly that reason, to punt the actual naming implementation and avoid silly internet fights like this.

You can’t ignore the cryptocurrency layer, it’s required to fund the miners/validators who secure and run the chain. Blockchains don’t work without the cryptocurrency.

And there’s already at least one blockchain purpose-built for naming - https://handshake.org/.