What is friction in computing? From what I gather, it has something to do with making a task easier, and/or take less time. If that's the case, then Zuckerberg is saying easier sharing or faster sharing. Easier sharing sounds ok, but faster sharing sounds a bit suspect, and yet that's what we are getting. The important point that Vardi is elucidating here is that removing friction from a task fundamentally changes the nature of the task. Removing friction from physical mail means that you no longer have physical mail. What if instead of frictionless sharing, Zuckerberg proposed that the goal was, frictionless relationships? I agree with JTHipster that humans need adversity. It's worth considering that everytime we remove a known adversity, we might be creating a vacuum that will be filled by an unknown adversity. But it's not just computing. The pharmaceutical industry has been working for the past two decades on the frictionless psyche. What kind of vacuum has that been creating?