My comment was about comparing async/await as an evolution of other "async models" compared to just using native threads - which is mostly about efficiency. It

My comment was about comparing async/await as an evolution of other "async models" compared to just using native threads - which is mostly about efficiency. It's not so much about comparing an async callback based solution to asycn/await - which is as far as I understand what your comment is about. I agree that directly standardizing async/await or coroutines instead of a lower-level abstraction (callbacks, promises, etc) can improve both efficiency and ease of use.