Yeah, I'm on the non-S cycle, going from a 3G to a 4 to a 5. Each of those had a feature (3G, Retina, LTE) I wouldn't have wanted to live without for a year, but for quality of experience and useful lifetime, the "S" cycle is the place to be.

But I expect Apple will stick with the C/S distinction for at least one generation, and my next phone will be called a "6S". Or a "6X" for "extended"? No reason they have to stop at two letters/models.