[codedokode]

> Seems like it's obsolete.

Then you can write your own Deferred implementation. I didn't even know it was implemented in browsers.

     const run = async () => { ... }

How to read this? run is a constant that equals the result of calling function async() thas maps to something in curly brackets? This is confusing.

> If you want to write async code, use async / await.

That is a good idea, but it has nothing to do with arrow functions.

> It also allows you to do scope binding in a different manor

`this` binding in JS in classic functions is broken by design, so yes, that is the advantage of arrow functions.