I'm sorry, but after having used TypeScript there's no way I'm ever going to back to writing pure JavaScript anymore (for anything but the most trivial stuff). It's borderline irresponsible, IMO.
I'd like to say I love typescript, too. It's better for collaborative development than raw JS. My point is different, that working in the "low level" or raw JS, obfuscated or not, is where the substantive work happens. Good example is the people working on frameworks.