It's still worthwhile even if you have to fudge module boundaries or skip the hard parts. Kind of like having "safe" Rust wrapping "unsafe" C boundaries doesn't

It's still worthwhile even if you have to fudge module boundaries or skip the hard parts. Kind of like having "safe" Rust wrapping "unsafe" C boundaries doesn't make the rest of Rust not worth it. Lying about the type internals of your function is still preferable to the wild-wild west of JS.