You are right, in general PGP is a pain - however, purely in the context of this thread, I believe the use of modern, reliable and more usable tools are non-trivial - and one has appreciate their efforts towards making the digital world a more private and secure place. By the same token - I will advice Mailfence (https://www.mailfence.com), where we have dealt with those conventional usability issues and have came up with sound working models. Also, check following links too for best PGP encryption and digital signing practices... - https://blog.mailfence.com/ope... - https://blog.mailfence.com/ope...

Whatever the reasons are behind Ghostmail shutdown, I firmly believe that privacy-conscious users looking for email alternatives will not be let down - as their are other numerous other services out there, which are fighting for digital freedom and striving hard to provide secure & private emailing services at the same time (mailfence is one of them, that I personally use and am extremely satisfied with it). Now the only loss which I see here is more of a higher level to privacy-conscious community on the whole, which certainly needs more and more related solutions unless end-to-end encryption goes mainstream.