most of the time I replace my phone because the battery degraded so badly and a replacement is expensive.

Its not enough by itself that the phone has amassed scratches and is 20% slower or has a 30% worse camera optic than the current generation, or that updates will only continue for a year or two more.

But the slowdown (associated with battery degradation btw) and fact that it doesn’t get me through a whole day definitely move the needle into me buying a new phone.