The current delta between Typescript and ES6 is very small so even if you have an "abandon ship" moment it's probably a days worth of work to get your code comp

The current delta between Typescript and ES6 is very small so even if you have an "abandon ship" moment it's probably a days worth of work to get your code compiling with Babel. In fact Flow's types are similar enough that you can probably use the same type information (or just pass it through babel-transform-strip-types).