This article is 90% a rant against “callback hell” that js was facing before async/await was introduced. The remaining 10% stays valid even in the presence of async/await, but the trade-off (ignored by the article) of the alternative is having to manually deal with synchronization primitives (at least channels), which would make zero sense given that JavaScript is a single-threaded environment.

Rust is a different beast, you can have whichever model you like best (OS threads, M:N threads (with third party libs), async/await) but async/await is by far the most powerful, that's why it's such a big deal that it lands on Rust stable.