Earlier quoted context omitted.
I don't think Mailpile is potentially valuable because it immediately solves the encryption problem, but because it solves the MUA problem. All innovation in the secure email space has been blocked for the past 13 years by one primary problem: webmail . It is simply not possible to develop a secure email solution if webmail is the only viable option for accessing mail, so most people who would be interested in innova…
Wouldn't Mailpile make things better even if you kept your GPG keys on the server? Sure, if the authorities targeted you specifically, they could probably pry the unencrypted keys from the server's memory (although with considerable effort it it was a dedicated or collocated machine) but widespread adoption of that model would completely stop dragnets. Only narrowly tailored investigations would be feasible, no mass…
Sure, your local machine could also be raided and the keys grabbed from that, but that's not a problem with using a VPS so much as a problem with your local setup.