The presentation in the article is actually top-down, contrary to the title.

An alternative title could be "all the hoops we have to jump through because we don't have lightweight threads and Loom yet".

> You might say that coroutines are the monads of parallel programming.

Nope. concurrency. parallelism is a resource.

Excellent article, and it is still unclear to me about how to reenter the code block if suspension occurs.