That's fine for atomic types like string or int, but typescript goes a lot deeper than that with powerful generics. For example, I'm working on a library of fun

That's fine for atomic types like string or int, but typescript goes a lot deeper than that with powerful generics. For example, I'm working on a library of functional data wrappers. This would be useless without Typescript and impossible to type without generics. There's also no way to share and reuse types in comments. Do you copy paste comments to "type" things? What about complex objects? What happens if the comments get out of sync? How do you test them? I used to be a typescript skeptic too, but much of that skepticism tends to come from drastically underestimating the power of the TS type system.