This is interesting. The things you list as problems are the same set of things we tried to solve: - automatic compilation that is fast - sourcemaps work -

This is interesting. The things you list as problems are the same set of things we tried to solve: - automatic compilation that is fast - sourcemaps work - decoupling of packages to help compatibility - automatic tsconfig management I wonder if you would have a different conclusion with these things taken care of. I agree that TypeScript makes it easier to have functions with complex parameters - because they are now documented and more understandable. So yes, this demands more discipline on the API designer to keep APIs simple.