only the truly dedicated would continue to upgrade every year, which I think personally is a waste simply because since Tim took over innovation is rare, and instead what we have is a drip feed of incremental improvements, and features that are only available on certain models through iOS (but which could be made available to older models, but then bang goes the planned obsolescence model etc.).
I went from a 12 Pro to a 15 Pro Max, and I'm going to skip this year and see what happens next year. What I am certain of however is that I won't be interested in a fold device, I have an iPad for that stuff thanks.