I read epubs, and they’re mostly html and css files zipped. The whole book usually comes under a MB if there’s not a lot of big pictures. Then you come across a

I read epubs, and they’re mostly html and css files zipped. The whole book usually comes under a MB if there’s not a lot of big pictures. Then you come across a website and for just an article you have to download tens of MBs. Disable JavaScript and the website is broken.