[effisfor]

I've tinkered with nostr and there's plenty to agree with here, but it's not specific to nostr. Nostr is in its very early days where people who tinker now are also pretty good at protecting that private key (dorks like us). For mass adoption we're probably going to see WebAuthn develop and solve the problems you're mentioning for most non-technical people. The early dorks will flinch at Apple/Google syncing people's e2ee keys, but techies will always be able to just dial in their private key to the client of their choosing. So it will be a bit messy, but hopefully the best of both worlds. And a giant improvement from current paradigm.

I don't use it, but Minds is an example of an app that is using delegated keys to sign people's messages using nostr protocol, allowing a user's data a route out of Minds' infrastructure in the future. Again, seems a healthy improvement.