[newscracker]

My pessimistic guess is that end-to-end encryption will be removed from WhatsApp, Allo, etc., in a matter of time with flowery language like, "...to provide the best possible experience that our users expect and deserve, and to empower our users with choice, we're switching the default (to quick plaintext communications)...the communication will still be secure through encryption on the network from client to server to client."

Then it'll become like Messenger, where end-to-end encryption is an explicit choice (similar to Secret Chats in Telegram). Not that people using WhatsApp would really care. The stickiness factor is quite high.