It helps to have terse code constructs (destructuring) or more sane behaviour (const/let vs var scoping). I don't think constructs like pipe operator, nullish c

It helps to have terse code constructs (destructuring) or more sane behaviour (const/let vs var scoping). I don't think constructs like pipe operator, nullish coalescing or optional chaining hampers language to the point that it becomes impossible to know at reasonably deep level. Those are quite fundamental, often quite simple, concepts and many of them are sprinkled around different languages here and there already. TypeScript for example has much harder learning curve. Personally I find things like generators, async generators, tagged templates absolutely essential in day-to-day work and can't imagine working without them. Recent additions to JavaScript language through healthy community interaction were absolutely great IMHO.