WhatsApp won't easily be dethroned. Personally, I've sandboxed it by buying an el-cheapo Android and exclusively running it on that phone (using it mostly throu

WhatsApp won't easily be dethroned. Personally, I've sandboxed it by buying an el-cheapo Android and exclusively running it on that phone (using it mostly through WhatsApp web). It's too late for the world now, though, 99.99% of people will give in to the FB threat, FB will be free to use that data - which takes 3-5 years to become stale. So as far as FB is concerned, they have received everything they need, and have that many years to manage the next fight for dominance. But perhaps if Apple somehow introduces a "contacts" sandbox (e.g., have a contact chooser like the file chooser) and google is forced to follow suite, there won't be another one like it.