I recently replaced my daughter's iPhone 5S with an iPhone SE (got a good deal from the carrier). No matter what I say, she still complains about having an iPhone 5 when her friends have iPhone 6 and 7 models.
At the same time, I upgraded two iPhone 4S phones because T-Mobile changed their 1900 MHz band to LTE, which 4S doesn;t support. That dropped speeds down to 2G level. People can't live with such slow speeds anymore.