>> "Needless to say, I sure wouldn't even want a smart phone from 6 years ago."
It covers all items though, not just smartphones. If I buy a fridge or an oven I expect it last 6 years minimum. Also, I'm regularly surprised by people using very old smartphones (4-5 years).
At this point there's little reason a smartphone couldn't last 6 years. My current device (a Sony Xperia Z3) has a quad-core 2.3GHz processor and 3GB of RAM, my desktop computer 6 years ago was less powerful than the device sitting in my pocket!
Sure, I wouldn't expect to play all the fancy high-end mobile games (like I ever play mobile games...) that come out 6 years from now, but I see absolutely no reason I couldn't continue to use the phone for email, web browsing, facebook, etc.
It covers all items though, not just smartphones. If I buy a fridge or an oven I expect it last 6 years minimum. Also, I'm regularly surprised by people using very old smartphones (4-5 years).