I can agree with all of that but still question how it requires so many supposedly “best” engineers. Facebook won the network effect lottery years ago, creating

I can agree with all of that but still question how it requires so many supposedly “best” engineers. Facebook won the network effect lottery years ago, creating (or falling backwards into) an addictive platform that people join because everyone they know joined, not because their platform has obvious technical advantages over competitors. They scaled the platform organically over time because they had to, not because of some genius master plan. My parents successfully use iPhones and iPads and GMail, along with Facebook. I can’t say they “like to use” Facebook, but if they want to see photos of their kids and grandkids they have to use it. I don’t know anyone who enjoys using FB, including my own kids. It seems users see it as a necessary evil — where else can they go?