[surgical_fire]

I have a OnePlus 6T acquired in 2019 that is absolutely fine to this day. I only replaced it because they dropped support for new OS updates.

I installed DivestOS on it and use it as a backup phone (i.e.: I take it with me to the gym, and keep my main phone at home). If they had kept support, I wouldn't even have replaced it.

[pseudosavant]

Single threaded (best indicator of device responsiveness) Geekbench score:

2018 OnePlus 6T: 521

2017 iPhone 8: 1020

My older phone is literally twice as fast. From a performance perspective it will be usable far longer than the OnePlus.

[wpwpwpw]

I have a Redmi note 7 with a 351 single core score and I am perfectly happy with it. Just replaced the original firmware with lineageos.

[surgical_fire]

And yet, despite benchmark numbers, my point still stands. For all the usage I listed above, my old Android is perfectly serviceable. Not once I was using it and thought a better CPU might speed something up, because nothing was slow. The phone never feels hot while using it.

When I try a new phone, I don't see any noticeable difference in speed. Everything loads more or less the same.

A better CPU (even one twice as fast) on a smartphone brings virtually no benefit at this point. Half of "this is pretty fast" is still "pretty fast".