The most significant new thing in the iPhone 15 Pro this year isn’t its lighter titanium frame, new A17 Pro processor, or its camera system (although all are appreciated). For me, it’s the Action Button: the little button above the volume keys that replaces the mute switch that had been on every iPhone since the very first one.
The Action Button is perhaps the biggest hardware upgrade the iPhone line has received in years. It’s not a particularly advanced piece of technology — it’s…
