[shaded-enmity]

Fair point, however I think that you're mistaking language design discussion in a closed group of PLT invested people, and a blog post targeted at general audience.

Visiting https://rust-lang.github.io/async-book/ I don't see any mentions of neither C# nor JS. The key difference here is the audience.

[steveklabnik]

The async book is in the process of being re-written; I wouldn't be surprised if a comparison to JS ends up in there, given that we have some significant differences and it really trips up a lot of people who come from JS.