That seems like a pretty good trade off for mobile devices. They usually don’t have sustained performance needs, you aren’t going to render a movie or do other

That seems like a pretty good trade off for mobile devices. They usually don’t have sustained performance needs, you aren’t going to render a movie or do other long running computational tasks. But mobile has a lot of bursty power demands: Launch dozens of app many times a day for example. You want your short-ish interactions with your phone to be snappy.