I've worked on a large typescript project for the past 6 months with 5 developers, and this type of superficial analysis doesn't track at all with our experience. Yes, TypeScript is a superset of Javascript - aimed at making large projects more maintainable. If, as this seems to saying, you're starting with the assumption that JavaScript is a terribly flawed language, TypeScript probably isn't going to make things magically better. But then, perhaps you should consider working in a different area of your application (or the industry), because JavaScript is what we've got to work with.