When people say a language "unifies sync and async code" all they mean is that there is no distinct syntactic category for "async routines". Rather, asynchronou

When people say a language "unifies sync and async code" all they mean is that there is no distinct syntactic category for "async routines". Rather, asynchronous operations are expressed as regular (i.e. synchronous, blocking) methods spawned on another thread. Either you agree that there is no loss in what you can express or believe it is doomed to fail. I don't understand how you can do both.