I’m curious of this as well. I did the speed performance tests and the single core processing score was still what they say are expected for brand new phones but my multi core score was lower. My battery is at 77% and my iPhone 11 is so slow it’s often unusable.
I’m hoping the iPhone 14 will have an option that doesn’t cause migraines because I don’t know how much longer I can keep this POS but I’m hoping a new battery will give me another year if the iPhone 14 still has a ****** OLED screen.
I seem to remember being able to override peak performance limitations in the battery settings. It seems to me we could opt out of it at our own risk of experiencing sudden shutdowns. Not sure if it still exists, but could be worth trying.