I preordered an iPhone 7+ for launch day delivery. I upgraded my iPhone 6+ 128GB today to iOS 10 and felt like the software upgrade gave the phone a new lease on life. It's not instantaneous in its response time but it's not any worse than iOS 9. My only concern is if I forego upgrading till next year the resale value might drop a lot. However, I would be able to maximize usability. Anyone else doing the same cost benefit analysis?