Mark Zuckerberg answers to Koum leaving:
"Jan: I will miss working so closely with you. I'm grateful for everything you've done to help connect the world, and for everything you've taught me, including about encryption and its ability to take power from centralized systems and put it back in people's hands. Those values will always be at the heart of WhatsApp."
https://www.facebook.com/jan.koum/posts/10156227307390011?co...