It was typical Apple arrogance but the actual issue is not nefarious, aging batteries deliver less and less current and eventually it makes devices crash or pow

It was typical Apple arrogance but the actual issue is not nefarious, aging batteries deliver less and less current and eventually it makes devices crash or power off unexpectedly. Always been that way. They just figured out you could improve stability by throttling the CPU to reduce current draw and didn't bother to tell customers. In reality we should think of most modern devices as wearing out over time. Batteries age, flash cells go bad, LEDs dim, OLEDs burn in... Most everything gets slower / worse with use and it would be better if device manufacturers disclosed that clearly.