What's annoying about this particular issue is that the problem that users don't like isn't Apple's battery saving measure, or even being lied to, it's phone performance slowing over time. That is what users care about. The battery peak load degrading over time is a factor, but even with battery replacements phones will feel more sluggish over time because the NAND is a disposable part. Fill up a higher percentage of your total storage? Feels slow. Take videos for a year? Feels slow. There is no reasonable oil change for this and it's something that is not being talked about anywhere.