Spoken like a true Apple executive! Why? If the phone still works, and is capable, why should anyone be forced to upgrade? Not everyone needs the greatest and latest.
If the iPhone 7 still allows these users to text, review their social media, etc, then that's great.
Because those users have a double standard.
They won't allow Apple to make a business decision (increase revenue from people upgrading) while their main reason for not upgrading is a business decision (to save money).
If it is acceptable for customers to make business decisions, it should also be acceptable for the opponent.