If you're trying to say you think a phone should last more than 3-4 years, that's a pipe dream. Phones are getting several times more powerful every year on average, there isn't a hope in hell that any phone could hope to stay current for more than a couple years. The fact that the 4S is still being supported is a miracle. I have a 6+ on order, just to use until the 6S comes out, has the bugs worked out, and supply fills out. But up till today, I was using a 5C, running the iOS 9 beta. Even that slow, old thing was still working very well. Sure, some people have bad experiences, always. But again...iOS is the most efficient OS there is, Windows is close behind I suppose because it works well on low spec phones. Apple, as a whole, does amazingly well with keeping old, slow phones up to date.