It's a bad design problem on the websites. AMP rendered pages are blazing fast to load on mobile and still contain ads. Desktop apps of yore had similar problem

It's a bad design problem on the websites. AMP rendered pages are blazing fast to load on mobile and still contain ads. Desktop apps of yore had similar problems and people complained about them then (ex: Java swing apps locking up when devs did real work on the UI thread). Things can work well with minimal CPU power, it's just grand design problems without the engineering effort going into it to make sure it's performant. Bad performance is much less apparent than bad design to decision makers.