I'm very excited by this idea. I feel like email/chat is ripe for reinvention.
I don't agree with "Domain control as a fallback", as the author said "a domain is not owned, it is rented" and I want to normalise the idea that if you lose your private key, you need to start again. I hate that we keep giving so much authority to domains, it's such a big weakness. The author even left the key rotation chain out of the initial implementation.
I still think root/signer keys or sigchains are decent options.
I don't agree with "Domain control as a fallback", as the author said "a domain is not owned, it is rented" and I want to normalise the idea that if you lose your private key, you need to start again. I hate that we keep giving so much authority to domains, it's such a big weakness. The author even left the key rotation chain out of the initial implementation.
I still think root/signer keys or sigchains are decent options.