Even better. You don't even need to set up a build system for async/await, ES6 modules (coming in Chrome 61) these days. Most modern browsers support a great portion of ES6+ specifications by default.

Live / Hot reloading might take some setup though.

One thing I am yet to see implemented, is tail-recursion. It's in the spec, but I am yet to find an environment that implements it. Please correct me if I'm wrong.