Going on a tangent. I don't like Facebook as a company due to its policies. I wouldn't be surprised in the least if one of these days the WhatsApp end-to-end encryption is "discovered" as broken, followed by a quick scramble to explain it was a temporary glitch and that they found it quickly and closed it. It would just make the headlines for a day or two and then be forgotten. Most people using WhatsApp never cared about any kind of encryption or thought a lot about privacy, and most people using it now still don't.
Hasn't that already happened a couple times ? (except they not pretended to a temporary glitch and fixed it, they just went and said this is not a security flaw, this is a feature!).