No, if you read the article the question is not "why you should use async in Rust" or anything like that. It's literally "why async Rust" as in "why async Rust

No, if you read the article the question is not "why you should use async in Rust" or anything like that. It's literally "why async Rust" as in "why async Rust is the thing that it is," why it is that way, how it came to be, etc. There's some unavoidable level of relationship, but that's not the focus of the article.