My iphone is currently 6 years old, and still getting security updates from Apple. It works as well as it ever did (I spent €60-ish for a battery replacement a year or two ago), and I hope to get at least another year out of it yet.
It cost me about €600, and I also enjoy knowing that I've generated that much less e-waste compared to my prior Android life, where I had to discard phones every 2 or 3 years.
First, let me point to Fairphone which is also providing 7 years minimum of updates, but most importantly, it does not lock me into their OS and I can install anything I want (in the case, MurenaOS).
Second, I'd love to be proven wrong, but I can bet good money that if we look at a distribution of activated iphones per model, we will see that most users probably stay a lot less than 6-7 years.
Third, it's not about iPhone vs Android. It's the fact that we are discussing things like "getting security updates" when in fact we should be asking ourselves "why aren't we free to install whatever system we want on our own device?" I don't really care so much about the fact your phone cost 600 or 6000€, what bugs me to no end is that we are effectively paying trillion-dollar corporations to let them remove our freedoms.
It cost me about €600, and I also enjoy knowing that I've generated that much less e-waste compared to my prior Android life, where I had to discard phones every 2 or 3 years.