Your critique is about JavaScript, not about TypeScript. Your argument is that TS blindly trusts 3rd party typings, but Kotlin has the same exact issue! In fac

Your critique is about JavaScript, not about TypeScript. Your argument is that TS blindly trusts 3rd party typings, but Kotlin has the same exact issue! In fact the Kotlin docs say to use TypeScript typings, or "dynamic" (read: unsafe) mode for 3rd party libs. So I would expect the same level of safety between TS and Kotlin when it comes to 3rd party libs. I personally prefer TS because it's safer: with literal types and mapped types, my code is far safer than the equivalent Kotlin. It will surprise you how often you use these features.