Wasn't the purpose of that throttling to extend the life of older phones? Throttling the CPU let them stay within the limits of the worn out battery and let the device continue to be used without crashing.
I'm going to play the odds and guess that you're not a battery designer.
Apple did not actually offer the replacement program within ~600km of my home, but I managed to convince them that an Apple Authorised Service provider in my town at least do it. They agreed and gave me a CS Code valid for the the battery replacement to be done.
But it was ultimately denied because of a tiny chip in the glass on the screen.
I really liked every other aspect of this phone though.
* Only handsets with degraded batteries were throttled
* Replacing the battery returned the handset to full speed
* The only thing that changed after the fine was that you now have an option to stop the throttling and have unexpected reboots instead.
* All iPhones since then, including brand new iPhone 12s will throttle when the battery degrades.