What you can do as a consumer is.. not buy new iPhones? I don't mean as like a protest or anything. I mean just don't buy your iPhones new. They don't change much anymore, you can get caught out by this or Antennagate (or any other type of issue you get to encounter as a first mover), and the changes between years are genuinely minimal now. The iPhone came out in 2007. The iPhone 4 came out in 2010. The leap from the…
It looks like you're using an average lifetime of 9 years for the 2.1x factor. I rarely see phones past 6 though and that's approximately how long they receive updates for.
I've also never seen a used iPhone that cheap where I am. Here a new 15 max is $1450 and a used 13 max is $1000.
Using a 6 year life:
$1000 / (6-2) = $250
$1450 / 6 = $242
So if you use a phone to the 6 year point, you are paying less for a better device, and without any unknown damage or wear. Migrating less often to a new device is also a small time saver. Even if you go to 9 years, the new iPhone is only 1.13x more.