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.
It was to extend the battery life, which was a workaround for the flawed battery design (contra CPU power draw). I bought an iPhone SE in the first month available and it started throttling by month 10, I'm not a battery designer, but I did not buy a device marketed as 2x the speed of 5S only for it to silently drop to 0.8x the speed of the 5S less than a year later.
In which they had a whole year of really cheap, highly subsidized battery replacements to correct their error. I think Apple should be forgiven for this
I was unable to benefit from the battery replacement due to a chip in the screen they discovered after I got a CS code to do it: https://i.imgur.com/Gr1bPTU.jpg
Effectively a coupon code issued by a customer support representative.
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.
I wish they gave those odds in Vegas: OP said right there in their comment that they're not a battery designer. Now, granted, perhaps OP should have not run their fingers on the keyboard about topics they know little to nothing about...