this. years ago i was working with Intel and Samsung to enable Tizen on x86 phones. energy management was the biggest problem they had. RISC won. moreover, 8 years later Apple was moving away from x86_64 to ARM, so one could say ARM won because of better energy management, either through lower usage or other types of energy saving techniques. Google Pixel (ARM) had similar issues with battery life, or better yet battery drain during idle times. People underestimate battery saving techniques. As in all software engineering, when the focus is enablement, optimizations take a second stage.