"gpg is hands down the better way for mortals..."

Snort! How many clients/friends/coworkers have you had to explain PGP, GPG, public keys or just compressing a file with a password to?

For us semi-interested cypto/security aware geeks, it's not difficult. Easier than learning the details about git or picking up Erlang. But for the normal user/client/manager it's like speaking Latin or the understanding Alchemy economics in Skyrim. PKI/GPG is one of those things that falls outside of their give-a-shit enough to understand circle.