This feels like added complexity to the runtime where the long term goal appears to make Javascript into a sort of opt-in Typescript runtime. Not sure if that's

This feels like added complexity to the runtime where the long term goal appears to make Javascript into a sort of opt-in Typescript runtime. Not sure if that's a good thing or a bad thing - but it certainly means added complexity. That being said, npm is a mix of both so it's not like you can be exclusively javascript only anyway these days (you have to be able to read and understand typescript as they are dependencies)