Isn't keybase.io just a way of storing public keys? If they go down, and you still have the private key, you can just sign a message saying "No, really! It's me

Isn't keybase.io just a way of storing public keys? If they go down, and you still have the private key, you can just sign a message saying "No, really! It's me!" The issue with distributed systems that rely on public keys is the lack of options to turn to if the keys are lost or compromised. And yes, people will lose keys. Systems that rely on keys for identity need to figure out what options people have at that point to re-establish their identity.