Hard to say. I can actually see it happening at the moment (my son's school friends are having babies now). Whether that will transfer to the next generation is

Hard to say. I can actually see it happening at the moment (my son's school friends are having babies now). Whether that will transfer to the next generation is another matter, but Facebook's user base and engagement levels are still growing. Something with 1.5 billion users isn't likely to disappear in a hurry. Since Facebook already owns Instagram, WhatsApp and Oculus Rift, and can afford to buy any startups it wants, even a decline in core Facebook use wouldn't be terminal.