Arrow functions, splats, default params, string interpolation, lexical scopes, classes, destructuring assignments, chained comparisons, for loops. I'm not sur

Arrow functions, splats, default params, string interpolation, lexical scopes, classes, destructuring assignments, chained comparisons, for loops. I'm not sure how you figure you enumerated which do and which don't. Apparently I'm preaching something unpopular, all my comments have been downvoted a bunch.