You also have to consider a dramatic increase in what JS does in addition to there being 10^10 more JS in the first place. You didn't really see JS libraries be

You also have to consider a dramatic increase in what JS does in addition to there being 10^10 more JS in the first place. You didn't really see JS libraries being used on every site (especially staples like jquery and angular, which combined add a few megs to pageloads). The use cases of JS have shifted - many sites don't even render anything with JS turned off anymore.