If you look at which ES6 features are actually supported by the major browsers (https://kangax.github.io/compat-table/es6/ https://kangax.github.io/compat-table

If you look at which ES6 features are actually supported by the major browsers (https://kangax.github.io/compat-table/es6/ https://kangax.github.io/compat-table/es6/) it doesn't look like you can drop Babel any time soon. Some features are pretty well supported in the major desktop browsers, but if you also include mobile browsers it doesn't look that good.