Yes, for a lot of folks, the camera is the reason to upgrade the phone. No matter what processor they put in the phone, you are not going to talk faster. When I want a better camera, I buy a better camera. When most folks want a better camera, they buy a new phone.On a related note - The camera on my iPhone has now become the main reason I upgrade my iPhone. It has caught up to the Canon M and gives me 4K video unlike my M5.
My friend in Oklahoma has taken really nice panoramas with his iPhone. I recently printed out three of them for him on roll paper. Two of them were of sunsets, one of Rome from the Palatine hill, and one including the Alhambra. They presented extra challenges to me because of the differences between light and dark by my not having Raw files to work with. But I think I did rather well editing them for printing.