PGP and S/MIME are widely considered as insufficient. Certainly, they existed for a long time, and yet it did not seem to impede police investigations. Whilst

PGP and S/MIME are widely considered as insufficient. Certainly, they existed for a long time, and yet it did not seem to impede police investigations. Whilst I don't think the current complaints aren't exaggerated I do believe police when they say "Because of whatsapp, we are hitting cases where we would normally send a warrant, but now we can't". This wasn't the case before with PGP, and with decent reasons. (PGP is not very user friendly)