My note was inspired from a prompt by protonmail to change my Bigtech co non-proton login email to protonmail instead. What protonmail product team displays here is the importance of owning their customer’s logins to other tech services. What if: there is a solution to replace your e.g. amazon email login (protonmail, gmail, or other) with a nostr keypair with a click of a button? How do we get here? Does this necessarily rely on e.g. amazon adding nostr support?

using your nostr npub as a login identifier, instead of needing to give an email address