2nd, they don't care about older-than-3 iphones. But they care about getting old iphone owners to feel good about themselves and to upgrade to a newer one. And disparaging older products goes against that.
The author of this piece has got it completely confused: Talking sh*t about your old products is in the Microsoft playbook. Whenever they have a new Windows coming out, they tell you how bad the old one was so you should upgrade. Apple has never done that.