This is correct. I feel there are 2 distinct levels of knowledge with Typescript: the application level and the library level. The application level is fairly e

This is correct. I feel there are 2 distinct levels of knowledge with Typescript: the application level and the library level. The application level is fairly easy, but if you want to write libraries with good types you're going to have to dive in the more complex features of Typescript. Still not rocket science, but it takes way more than 3 hours, even if one studies it intensively.