I have a number of thoughts in mind, which will likely turn into posts, and they are all leading up to a bigger unified thought. This is one of them.
PGP / GPG email encryption is a good thing. It’s a pretty secure system, and the public registries of public keys makes it easy to communicate securely with someone new, with a reasonable amount of trust. One major issue, which I think most people identify as the biggest issue with PGP, is that the popular mail programs don’t support it out of the box, or don’t support it well.