The futures underpinning of Tokio actually doesn't have much to do with futures. The task system is really what is special about it (though, currently futures a

The futures underpinning of Tokio actually doesn't have much to do with futures. The task system is really what is special about it (though, currently futures are the main way it is exposed) however, there is a lot of potential other routes that can be explorered. If you want green threads, you could build them on top of the task system and it would interopt with futures.