In a world where people write that data on chain, it becomes trivially easy to find and impossible to censor
Discussion
Yeah, but chain operations become extremely expensive over time.
> If all I have is a pubkey, how do I find the corresponding IP?
There are many ways, but you basically would have a boostrap IP that can download NIP-65-like events of other relays. We could even use WoT to ask your friend's client to become the Bootstrap relay. Once you have a list of available options saved locally, you can easily get updated records by just querying a few of them. And if they go offline, you update the list with new ones. As long as you know the IP of a single relay, you can get all the others.
Do you think there’s any future for a decentralized dns-like protocol for unique vanity names?