It is even funnier because JS only got proper async after, what? 25 years or so of existence. The main reason JS went all in with async is because it only ever had a single event loop and that naturally fits with the async model.

I still remember the days when all the libs started adopting async and how so many of them (to this day) support both passing callbacks or returning promises. Async just so naturally fixed the callback hell of 2010s JS that it just became standard even though it is not even heavily used in the browser APIs.