The #1 problem, beyond the usability issues, is that most users still just do not care. They are willfully ignorant (a mentality which is actively celebrated t

The #1 problem, beyond the usability issues, is that most users still just do not care. They are willfully ignorant (a mentality which is actively celebrated these days in some influential countries), and cannot be convinced in the value of privacy or security. I have tried without much success to get people to move to ProtonMail. I have tried without much success to get people to move to Wire messenger. (And incidentally, the author mentions Signal and WhatsApp... I wonder why he doesn't use Wire?) So without consumers who care, the only audience for PGP and other security focused tools are the geeks who too easily tolerate bad interfaces.