For all those saying people will be upset about their random shutdowns, I don't think that's fair. I've experienced the unexpected shutdowns with my 6 Plus prior to the throttling update. It only happened when I was around 30% battery. So my phone functioned normally the majority of the day, and if I let it get down that low, it might be a problem then. Plus, if they are to be believed, Apple says only peak performance causes throttling now, so only peak performance should cause a random shutdown if throttling is off. Tim said he'd hate it if you were making an emergency call or have to send an emergency text and your phone shut down. So making a call and sending a text are peak performance situations? I believe throttling is on all the time for me, no matter what, but I'm anxious to see how my phone functions with throttling off. Maybe my battery has degraded that much that it can't provide the voltage required for even small things anymore.
Also, I assume throttling will be ON by default, so people will have to search out this option to turn it off, and I'm sure Apple will have a warning or description of what could happen when it's turned off. People will be informed. Some of you act like this update will turn off throttling and everyone's phones will be turning off left and right without explanation. If people start experiencing shutdowns and are unhappy, they know where to go to turn it back on since they've turned it off.
It's surprising that some people are so against choice. We already had a toggle for low power mode, I don't understand why this is seen as so different from that choice that was already given.
If my phone goes back to full speed and it only restarts unexpectedly around 30%, sign me up. I've been using a battery case for over a year anyway to try and get through the day. I'm also throttled when plugged in, which is crazy. If i'm using a battery case and my phone itself is effectively at 100% all day anyway, with the option to turn throttling off I'm hoping it just returns to even 75% of what it was when I bought it.