The software running Android phones, most of the internet, and all 500 of the fastest computers on Earth was written by a 21-year-old in his bedroom in 1991 and given away for free. Ten years later Microsoft’s CEO called it a cancer. Today most of Azure runs on it. Linux wasn’t a one-off either. Oracle owned databases and Postgres was a Berkeley research project. Then it wasn’t. Google open-sourced Kubernetes in 2014 and every proprietary scheduler I can think of was dead by 2019. Three…