Grandma's Son's client, paraphrased: "Yep, I watched my daughter generate that new nsec. it's 100% her". The client of those who supremely trust Son's opinion of his daughter's IT infra: "Oh damn, 'Son' said this was legit. There's no better source of truth. We're going to very highly trust that this new npub is her." Grandma's client: "Looks like everyone we trust to know who granddaughter is says this new npub is her. let's quietly switch over everything in our application to seamlessly make this change".