Apple’s iPhone upgrade cycle over the years has settled into a nice and predictable pattern. Every time Apple introduces an iPhone with a new form factor, it’s followed up by an ‘S’ upgrade that introduces new software and/or hardware features while retaining the same look and feel as its predecessor.
To wit, the iPhone 4s introduced us to Siri, the iPhone 5s brought us Touch ID, and the soon to be released iPhone 6s will bring us 3D Touch. ‘S’ upgrades are the real deal, and a strong case can be made that the iPhone 6s represents the most compelling and feature-packed ‘S’ upgrade to date.
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