[Zak]

PGP isn't that hard to learn, and 20 years ago when the main form of online messaging was email, using a desktop email client, it was easier. It would be considerably harder now with everyone communicating in walled-garden platforms.

I think we really missed an opportunity, and I don't see a way forward to a world where PGP keys are a widely-used basis for security communication and verifying identity online.

[qrbLPHiKpiux]

Key strokes required. Everyone taps today. Tapping input on a device is horribly inefficient.

[Zak]

This is one of several reasons about 1998 would have been the right time to popularize it, not 2018.

[tim333]

Though a plus of 2018 is people are being forced to sort out public and private keys if they want to muck about with cryptocurrency.