Please don't spread misinformation. It causes real damage.
Your statement is verifiable misinformation.
I am a customer who was actually experiencing unexpected shutdowns due to voltage spikes on a naturally degraded Li-Ion battery on my iPhone 6s. This is something that happens to all Li-Ion batteries. I had experienced this on my previous Android phones too when they got old.
The change Apple made was throttling the voltage from spiking to a point that it can shut down a degraded battery when your phone estimates that it has 50% charge left. Yes, this means older phones with degraded battery health (due to normal wear/tear) would run a bit slower. This is the right thing to do because otherwise it means customers would have phones shutting down unexpectedly when they needed them the most (e.g. calling an Uber, or some other critical function). It's a serious issue that absolutely needed addressing, and I'm glad Apple addressed it (and I hope other manufacturers do too).
The mistake Apple made was not communicating this change more widely or explaining in more detail from the start. But they did communicate it in the change notes of the original update they delivered. They weren't trying to intentionally hide it like you're trying to imply.
I made the appropriate edit in my original comment.
edit - Apple did not communicate this information to users from the start...that is not misinformation. When I replied to your comment, your comment originally consisted of just your first sentence.
Your statement is verifiable misinformation.
I am a customer who was actually experiencing unexpected shutdowns due to voltage spikes on a naturally degraded Li-Ion battery on my iPhone 6s. This is something that happens to all Li-Ion batteries. I had experienced this on my previous Android phones too when they got old.
The change Apple made was throttling the voltage from spiking to a point that it can shut down a degraded battery when your phone estimates that it has 50% charge left. Yes, this means older phones with degraded battery health (due to normal wear/tear) would run a bit slower. This is the right thing to do because otherwise it means customers would have phones shutting down unexpectedly when they needed them the most (e.g. calling an Uber, or some other critical function). It's a serious issue that absolutely needed addressing, and I'm glad Apple addressed it (and I hope other manufacturers do too).
The mistake Apple made was not communicating this change more widely or explaining in more detail from the start. But they did communicate it in the change notes of the original update they delivered. They weren't trying to intentionally hide it like you're trying to imply.