“declares that evidence concerning acts for which the President is immune can play no role in any criminal prosecution against him.”
To me (as a non-US citizen and outside observer) this seems to be the real problem. Seems to present a catch-22 to me. What am I missing?
I'd say customizability. Haven't used k-9 since I found FairEmail so can't really say anything about how it is now but it used to be pretty bare bones. At least compared to FairEmail.