The refresh rate escalation is a complete jerkoff bit of tech spec nonsense. "Far better cameras" is an exaggeration, as most are marginally better. iPhones have been incredibly fast since the XR, almost five years ago.
There was a period of dramatic progress but now things have largely settled. I recently replaced a 12 Pro with a 14 Pro and it is likely nothing at all changed. There is zero impact in my life. Have the 12 Pro waiting in my drawer for my son with an XR to upgrade, but he doesn't even want the hassle of doing the transfer and then setting up the apps that don't properly migrate data.