Itβs about how much you are spending every year for a device. A $300 device will last you 3 years. A $1000 device will last you 5. Are you willing to spend that much money, is it worth the improvements, usually in camera and support service?
I just buy mid range $300-$400 phones with big batteries and popular hardware, so I can make it last long.
Growth for the sake of growth is the ideology of a cancer cell.