[bPspGiJT8Y]

> You really do want to specify types manually, at least at boundaries, e.g. in function definitions

I think PureScript has the best compromise here, top-level type signatures are not enforced but if you don't include one you'll get a warning with the inferred signature. On the one hand, this is very helpful because sometimes I have a grasp for what expression I want to use, but am not sure about its type, so I simply comment out the desired signature and let the compiler tell me which direction I'm moving in, i.e. what's the type of what I just wrote. On the other hand, it being a warning also basically ensures nobody writes their top-level functions without the type signatures. Really the best of the two worlds. I think simply disallowing top-level functions without type signatures would hurt my workflow a lot.