async/await is not in the ECMA spec. It a proposal, like Object.observe(which was discarded) And remember one thing, Nodejs maintainers DO NOT control V8, the javascript engine powering it, they are entirely dependent on what the V8 team at Google does.

So you'll have to wait a long time and even so there is absolutely no guarantee async/away will ever make it to the spec. Same deal for decorators, developers shouldn't depend on non ECMA features. Even worse, the final proposal might be totally different from the current Babel/whatever implementation.

V8 doesn't even implement 100% of ES6, yet.