
In 2015 I was part of a large effort inside Apple to make iOS run better on then-4-year-old iPhones, and although we made solid improvements across the entire system, the result just wasn’t great.
And even if we managed to make the base system as smooth as it had been 4 years earlier, the amount of slowdown accumulated across the app ecosystem (and the web!) was simply unfixable at the OS level.
You may find this regrettable but it’s reality.
English

