You mean that having N+1 sensors every other year is redundant. My phone is 4 years old and had already a quite bad camera at that time so I wouldn't know.
Seeing photos from other people it's obvious how good phones have become (even if there might be some overengineering), on the other hand my phone also had a bad CPU / RAM / Battery / Screen for the time and people who have phones with more computing power than my laptop do the exact same things as I do.
I was more thinking that if people were paying they might give more thoughts to what they are diving into. But yeah I agree that's just a wet dream.