Nah. The reality is that the chips got powerful enough that the new chips really don't provide much additional value to most of the customers. Now having the latest chip provides longevity and that is very nice. But for most users, if you put a new battery in a used iPhone 8 it would be fine. And the things that user would miss the most would be the better camera. Not how well the chip performs.
I think it makes some sense to start giving customers a choice between a more powerful chip and a less powerful chip. And not forcing the user who has little need for the current best available chip, but might like other phone improvements, to buy more chip than they need or could even use for years to come. Or worse, leave them with only older and completely upgraded phones.