I'd also say that the JS and its burden on CPU, RAM, and battery, is also pretty trivial compared to rich media consuming more than a few MB's off a user's mobile data plan. Many people consider 1 MB to be around the upper guideline for bundle sizes; 2 MB of JS is considered quite big.

But HTML CSS JS cannot compete against rich media, and how badly it drains the user's most finite resource of all -- mobile data. That's what makes an information lookup even on native Yelp costly to the user.