Sorry if this has been asked before but has anyone thought hard about upgrading to a latest iPhone who presently uses a 6S? I have a milestone birthday coming up and my wife said she would buy me a new phone. Whist that is a great offer, is it worth it from a practical point of view. I hate wasting money. My 6S does all I ever need albeit on a 3 year old phone. I wonder how long the 6S will be supported, especially given I also have a series 3 watch. Your comments would be helpful.