Whatsapp encrypted voice chat is coming soon

This is why the U.S. Government's appeal to the tech/developer community cannot be yielded to. It isn't just the U.S. government at stake here. In fact, with e2e encryption, one can go a step further and have all communications over WebRTC channels (or similar p2p option), so that the servers only serve for negotiation...

Open the protocols, and negotiation layers so that it can be more secure... defer to third parties from the app (keybase.io for example) as a reference for public keys.

In the end, there will be ways for two people to have a conversation truly privately.