I agree that unneeded complexity is bad, but not sure I agree on all the points. "let" for example adds a keyword, but it allows you to avoid a big common cause

I agree that unneeded complexity is bad, but not sure I agree on all the points. "let" for example adds a keyword, but it allows you to avoid a big common cause of bugs in JS (using var in loops with closures, that capture the last value in the loop). If we could, then removing "var" and replacing it with "let" would be better - but that would be a huge change, to remove "var". > I'm probably alone in saying this, but I hope most of this stuff never sees the light of day. In any case, this stuff is seeing the light of day. It's been in Firefox for a while, and is now being implemented in Chrome. That means two independent implementations, which is crucial for the standards process, we can expect the other browsers to follow Firefox and Chrome on this.