Well, the article’s focus is on asynchrony. Naturally then, it talks about closures within the context of asynchrony and to the extent that it is relevant.

The author could have made the topic about closures, but that’s not what they wanted to talk about.

> caught a multi-threading bug

The compiler complained: “error[E0308]: mismatched types”

> anything where you want to pass functions around.

You should read the article! The author goes into this in fascinating detail.

> wrote them down on a post-it

You write it on local media and kept it on-premises?

Cloud is the new thing, I hear.