It still feels like a prototype. There's still lack of integration with some major language features such as traits, and the standard library is missing all but

It still feels like a prototype. There's still lack of integration with some major language features such as traits, and the standard library is missing all but the most rudimentary primitives; third party libraries help, but at the moment you are required to "takes sides" which async runtime library ecosystem you choose to use (for example, to spawn tasks), even though the thing you are doing doesn't require anything specific from that library. Finally, there are unsolved design problems about cancellation and destructors. And some murky behind-the-scenes stuff about the memory safety and soundness of self-referential types (which Futures often are). I think that at least the trait integration stuff is taking some steps forward these days, and hopefully the cancellation stuff too, which this blog post is indicative of.