> Finally, GPG's usability leaves something to be desired. Docker makes pushing and pulling of images extremely easy, essentially making everyone a publisher of content. GPG works when publishing software is more rare and you can take the time to use a new utility in order to get security guarantees, but we wanted to make it extremely easy so that anyone can do it.

A wrapper would have done an awesome job at that... I use GnuPG daily, enter a passphrase once and boom. Mails are signed, my password manager unlocked. Where is the "unusability" in this?