Case sensitivity i&#x27;m assuming you mean the automatic semi-colon insertion due to a line break after a return statement? I have a hard time seeing this as being a reason to dislike an entire language.<p>Most languages have features to avoid, JavaScript is no different. Many JavaScript developers use linters to avoid the poor `==` feature. I&#x27;m unfamiliar with the argument of the `Map` datastructure implementation being broken. Do you have a reference to that claim?