I agree with this. If it's nothing more than a forward-compatible superset of JavaScript, with optional static typing, it has a place in the world of JS target languages.
I'm not sold on forward compat. I'm only an interested observer of TC39 but to my knowledge only arrow lambdas and modules (the cross file ones) are near consensus. The rest of the features added have either been going around for a long time or haven't really gotten a lot of discussion.
