When we first began giving demos of Orion early this year I was reminded of a line that you hear a lot at Meta – in fact it was even in our first letter to prospective shareholders back in 2012: Code wins arguments. We probably learned as much about this product space from a few months of real-life demos than we did from the years of work it took to make them. There is just no substitute for actually building something, putting it in people’s hands and learning from how they react to it. Orion wasn’t our only example of that this year. Our mixed reality hardware...