I was an early adopter of the iPhone 11 Pro Max, after having skipped every iPhone since the 7 Plus. Well, actually, I had been through several 7 Pluses, because iPhones are so vulnerable to being dropped, and sometimes survive the fall, only to land in a situation or environment beyond recovery. I bought the expensive Pro Max 512GB version, so am usually treating it like a precious tablet/planner, to be kept hidden away from the attention of thieves, pickpockets, and armed robbers, while mostly continuing to use my remaining 7 Plus for most publicly-visible tasks. (I do carry two iPhones, each with a different service provider.)
Yes, the iPhone 11 Pro Max is a quite capable camera, from the wide to normal angles of view. It is still annoying to manipulate, as a camera, and offers no telephoto. Even for landscapes, I now tend to like using telephoto lenses. The night-shooting capabilities are probably the most novel thing, that I would like to try soon, when I can get well away from the city lights.
Even if not for thieves, robbers, and my clumsy hands, an iPhone is a single point of failure, for a device that performs so many tasks, and all of these tasks are consuming the nourishment from one battery.
So, these newest iPhones have yet to displace anything that I am doing with cameras.