[nidu]

I'm not sure comparison is correct. If you want routing in jQuery app - you will have some similar concept to routers. Using packers is also not required. And if you want some good automating module splitting in jQuery app - you'll probably pick up some packer as well. So it's more like HTML5/jQuery can be compared to just React without additions.

Most of these things that bring cognitive load have some purpose. It looks from time to time that developers start making tools in the sake of tools, but most of the time there's some sane reasoning behind.