I've babied my iphone x battery (battery case ftw) and it's at "86%" after five years. Even with all the nice features apple offers for battery management they

I've babied my iphone x battery (battery case ftw) and it's at "86%" after five years. Even with all the nice features apple offers for battery management they still design their phones to have undersized batteries and encourage usage patterns that degrade the battery in ~2 years, when they could just slightly increase the thickness of the phone and increase the lifespan to ~5 years. Very conservative depths of discharge and charging termination voltages can extend life spans into the 10,000 cycle ranges which is effectively forever for a device with a finite lifespan. And it wouldn't increase the weight of the phone too much: doubling battery capacity isn't doubling the size of the phone or even the battery itself. Just the active material in the battery.