My September 2023 14 PM: 454 cycles, iOS 18.7.2 from settings 86% and from Coconut 88.1%.
I had been very annoyed with its overall performance for months, but above all, the keyboard lag was unbearable.
I did the date change trick, the “clear RAM” trick, reduced motion, and made some keyboard adjustments, and now it runs like a bullet. It seems to have gone back to iOS 17 or 16. I hope to use it for at least two more years.