[_ar7]

Yeah I second this. Despite having a superior type system, flow is so behind in both tooling and 3rd party library definitions it's really hard to justify continuing to use it over typescript. It's weird to say, but the unsoundness of typescript doesn't matter much next to all the other advantages.

Besides, I feel like if I really want a strong type system https://reasonml.github.io/ might be the better choice over flow.