The real benefit will become apparent in a few years when the increased performance and amount of RAM will allow the phone to keep up with newer OS versions better than the previous models will. It also allows Apple to eventually wind down production on old chips (though I guess the A13 will stick around for a while in the new Studio Display).
I know so many people who love their iPhone 6/6S/7/8/SE2's and even consider the newer 12/13 mini models to be too large, despite the physical footprint being roughly equal. The reasoning being that it's harder to reach the entire screen on the minis. They will love this new phone.
Some good points well made ?