Why We Chose TypeScript Over FlowType

> StackOverflow questions: FlowType: ~900; TypeScript~38,000

> GitHub Issues: FlowType: ~1,500 Open, 2,200 Closed; TypeScript: ~2,400 Open, 11,200 Closed

> GitHub pull requests FlowType: ~60 Open, 1,200 Closed; TypeScript: ~100 Open, ~5,000 Closed

> npm download per month FlowType: ~2.9 million/month, TypeScript: ~7.2 million/month

Community size or StackOverflow questions or, well, "popularity" are not exactly what makes a language or platform _good_, but I usually find that everything else being equal, there's a direct correlation. It's much easier being part of an engaged community.