Supporting Older Devices
A few years back, Apple caught some flack for slowing down the performance on older devices. But the media coverage and resulting backlash surrounding that scandal were largely unjustified. For one, Apple implemented performance throttling to reduce random shutdowns on devices with aging batteries.
If you look a bit deeper, you can see that Apple has no interest in planned obsolescence. For one, it runs numerous repair programs where it fixes devices with known issues for free. It also continually supports older devices with new software and encourages users to trade in their old device for recycling when it does come time to upgrade.