Worse yet, Apple doesn't disclose this and it took an independent researcher to actually measure it and discover this. Wonder why? Smells a bit reminiscent of VW's diesel strategy.
"Thank you for spending your precious, discretionary income on a new Tesla! Your new vehicle will automatically slow down as it ages, because random battery parts will wear out, and going slower 'helps stop random shutdowns, which are a major pain.' By year five, your vehicle's max speed will be artificially limited to approximately 20 mph. We can help with that if you bring it in to an authorized manufacturer-owned store, assuming there is one in your country, or ship it to us at your cost, where we will replace a random part at only 20% the cost of a new Tesla. You could do this every year to maintain peak performance, but we prefer that you don't know about this at all and just buy a new car from us instead."
Planned obsolescence, with an air of plausibility to its reckless, environmentally unsound 'science' that forces you to dispose of the phone (if you don't know about this pre-programmed slowdown) or battery (if you do) before it actually ceases being useful to you.. brilliant.
But, when you get that shiny new phone home, you're blown away at how 'fast' it is compared to your previous phone.
It's actually breathtakingly brilliant, in an evil genius sort of way.