When I started reading your comment I thought you were going to argue the opposite. Getting my first iPhone (3G) was a huge change. iPhone 4 to the latest are mostly incremental improvements. Aside from the camera, I could probably live with an iPhone 4 without many issues. Only the software is a lot more bloated now.
We still had a Moto X from 2013 that my wife would power on every now and then to test an app that they were developing (iOS household), and besides the camera it still looks like a perfectly usable modern smartphone. When using it, it doesn't feel like a phone from the prehistory.
We still had a Moto X from 2013 that my wife would power on every now and then to test an app that they were developing (iOS household), and besides the camera it still looks like a perfectly usable modern smartphone. When using it, it doesn't feel like a phone from the prehistory.