Since I'm not a celebrity, one is as authoritative as the other :)
But one of them I can receive email on and it also hosts my blog, and if I wanted to, I could reference it here in my bio, just like how people do it for "non-self-custodial" social media identities.
It's not perfect, but at least it works across services for regular people without any risk of "handle sniping" once a new service becomes popular. (I suspect that for regular social networks, different rules apply to celebrities than to regular people.)
And for companies, there's always trademark law, which is already heavily integrated into the domain registry framework: Also not perfect, but definitely better than replicating the same solution to n services/sites.
But one of them I can receive email on and it also hosts my blog, and if I wanted to, I could reference it here in my bio, just like how people do it for "non-self-custodial" social media identities.
It's not perfect, but at least it works across services for regular people without any risk of "handle sniping" once a new service becomes popular. (I suspect that for regular social networks, different rules apply to celebrities than to regular people.)
And for companies, there's always trademark law, which is already heavily integrated into the domain registry framework: Also not perfect, but definitely better than replicating the same solution to n services/sites.