We need more speed. My iPhone SE 2020 scrolls more smoothly then my Intel Xeon, Nvidia 1080. Single core performance is only 10% better in the smartphone, but somehow the mobile system feels faster. A 15+ years old Mac with OS 9 is faster when typing input than an Intel MacBook Air with OS X was shown in recent benchmarks. "UI always scales to make any CPU underpowered" is a postulated law of computer engineering. Some people buying a MS Surface (7th gen) report bad perf, too