>requiring out of band key exchange will add significant friction how do you exchange phone numbers and email addresses with people? >and make signal much les

>requiring out of band key exchange will add significant friction how do you exchange phone numbers and email addresses with people? >and make signal much less popular compared to the competition is popularity among the (COMPLETELY) tech-illiterate worth giving up privacy for? >I can't think of anything that would work as well and result in so many (40M monthly) people communicating securely. and virtually everyone who had ever used the internet has an email, despite its apparently cumbersome sign-up and contact discovery procedures. >surviving the death of your phone, ... , account recovery are less likely if your account is tied to the phone number or email. they can be lost, they can be stolen, they can be seized.