The Angular team also managed to get TypeScript approved as a new language for internal development at Google, joining a pretty short list (Java, C/C++, Python,

The Angular team also managed to get TypeScript approved as a new language for internal development at Google, joining a pretty short list (Java, C/C++, Python, JavaScript, and Dart I believe). All the others were apparently decided by fiat in earlier days then grandfathered in. TypeScript is the first, and so far only, language to successfully go through the official approval process. I feel like we're going to see a big increase in TypeScript related activity from Google in the next couple of years, due to this.