I agree with what you are saying with regards to the tendency of the platform. But, aside from the weight of unnecessary/unused browser features, I think that h

I agree with what you are saying with regards to the tendency of the platform. But, aside from the weight of unnecessary/unused browser features, I think that has more to do with the needs of the developers attracted to the platform more than the platform itself. "The needs" being a requirement to ship a MVP ASAP using developers that can agree on a lowest common denominator language of js.