I would hesitate to call the use of an object as defined in the ECMAscript spec "misuse." Perhaps it is becoming a best practice to avoid it, but it's not misus

I would hesitate to call the use of an object as defined in the ECMAscript spec "misuse." Perhaps it is becoming a best practice to avoid it, but it's not misuse yet until we know that it causes an unavoidable performance degradation. The lesson here is that one feature of V8 is an arguments optimization, but you must never pass the object to other functions (i.e., you have to manually inline the calls you would have made).