The State of Software Security in 2019
ELI5 : It is 2019. Why isn't everybody using pubkey crypto for email?    i.e., transparent support of:
    * I publish a public key 
    * Anyone can use it to send me an encrypted email
    * I use my private key to read
    * as a bonus, I sign my email with my private key
    * anyone can verify with my public key