By the way, I haven't used PGP for a while beyond bootstrapping better forms of authenticated encryption or signing. I do occasionally deal with looking at the backlog of PGP encrypted emails, and I will sign emails as needed to confirm my identity, but I won't encrypt my mail.
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It's a completely garbage legacy technology with awful usability and poor security. I have no reason to encrypt emails to strangers because I'm not going to write anything I wouldn't write publicly here anyway. For anyone I want to talk to privately I switch to using Signal, etc.
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If you have a question that might as well be asked publicly, it's best to ask publicly and optionally anonymously on reddit.com/r/GrapheneOS or Twitter. Other people can benefit from the answer. I won't generally write in-depth responses like reddit.com/r/GrapheneOS/c for 1 person.
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Also, please just use an anonymous throwaway account rather than deleting the question after an answer. The reason that I'm so often willing to give very in-depth answers on the subreddit is because other people can see it and find it in a search. If you delete, I wasted my time.