Mohammad Fouad

As the team grew in size, we had to formalize the way we write JS. I beleive it becomes impossible to collaborate on a large codebase without relying on static type checking. we made the switch in a month, it was painful but we never looked back.

The main drawback is when you code, you used to have the code up and running with latest changes in a second. now takes 30secs to run now, so the feedback loop is slower, however, lots of type errors and trivial mistakes are cought by the compiler now