TypeScript is also incrementally adoptable, not sure how you were able to add JSDoc comments for types to a function for example while also being unable to conv

TypeScript is also incrementally adoptable, not sure how you were able to add JSDoc comments for types to a function for example while also being unable to convert that same function to TypeScript. JSDoc is strictly less powerful than TypeScript in general. For example, more complex types as well as template literal types are impossible to have in JSDoc. It is simply more ergonomic to use TypeScript instead of JSDoc, and therefore, I stand by my snap decision.