The Power of the S Cycle →
Couldn't agree more with the below.
“If you put aside what the phones look like, the S model years have brought some of the biggest changes to the platform. The display changes came in non-S years, of course — the iPhone 4 going retina; the iPhone 5 expanding from 3.5 to 4 inches diagonally and changing the aspect ratio; and of course last year’s 6/6 Plus expanding to 4.7 and 5.5 inches and higher display resolutions. But it was the 3GS that first improved on CPU performance and gave us the first improvements to the camera. The 4S ushered in Siri integration and a much faster camera. The 5S was Apple’s first 64-bit ARM device, years ahead of the competition, and was the first device with Touch ID. For a typical iPhone user on a two-year upgrade cycle, I think the S years are the better phones, historically.”