They did the throttling without any dialogs in the beginning. In the very next point release of iOS, that evolved into a battery health control panel where you can see the health of your battery, and it alerts you if it’s being throttled.

I don’t know why this is so hard to understand: their initial response was wrong, but they corrected it. Everyone who says “why didn’t they do X” is ignoring that they did the right thing, eventually.

Implementing the battery control panel the first time would have been the best route, but developing such a thing takes time, and with sudden shutdowns happening for a large percentage of customers, they did a stopgap that was questionable. Is it really so evil to make a quick hack at first and make a better solution in a software update? I feel like the whole industry does this.