The team are also working on an experimental VM with support for coroutines and channels, threads will also have growable stacks, that will allow a similar prog

The team are also working on an experimental VM with support for coroutines and channels, threads will also have growable stacks, that will allow a similar programming style as used in go. See: https://github.com/dart-lang/fletch https://github.com/dart-lang/fletch Async/await is just sugar, it doesn't actually change APIs at all. Note C# also added async/await long after their first release.