Coming from an 11 Pro Max, I watched Marques Brownlee's and Peter McKinnon's reviews. For my purposes, including for photography and video, I think that the upgrade to a 14 Pro Max won't make enough of a difference to justify the cost. I've decided to wait for iPhone 15.
I might well have come to a different conclusion if I used an iPhone as my principal still or video camera, but I don't. Next year, when I think that the upgrade might be more significant and I expect that Apple will move to USB-C.