Because the original iPhone was so stripped down that it could run on that thinly little slow cpu. It took Apple years and years to add features back into iOS f

Because the original iPhone was so stripped down that it could run on that thinly little slow cpu. It took Apple years and years to add features back into iOS frameworks. Every one very considered and every attempt to not destroy the battery of the iPhone. Multi tasking only around in iOS 4 right? Like on iPhoneOS 1 every app was closed when you hit that home button. That it worked so smoothly was the result of extremely focused UX.