The quiet success of Autocrypt and Deltachat
PGP has been around for about 35 years, more or less, and the single reason emails are rarely OpenPGP-encrypted is most people don’t know how to use OpenPGP. To get it right, we need to know what asymmetric encryption is, which algorithms and key sizes to use, how to include the correct key in our email signatures and how to make backups of our private keys. OpenPGP requires effort to use, and most of us invariably choose convenience over security.