Comment by stank345

Part of it is that JS's standard library is terrible (eg. no built-in union/intersection when working with sets, bizarre default sorting behavior see (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...), groupBy (see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...) is new and not well-supported, etc). You almost have to reach for some utility library or build your own ad-hoc one just to use the language.