I don’t consider upgrading a perfectly good phone (or other electronic device) unethical; just stupid if the old one works just fine. That’s why they add bells and whistles to the new models, so that people think they “need” them. I like my iPhone 6S just fine. I wish I had that 2-lens camera so I could take those portraits with the out of focus background; but I don’t need it.
"Now with Tint Control"...as in the classic Bloom County cartoon.