This is an interesting feature, but I think it’s going to confuse and anger a lot of people.
Until iOS 11, the Wi-Fi and Bluetooth toggles in Control Center worked the way it looked like they worked: they were on/off switches. Now, in iOS 11, they still look like on/off switches, but they act as disconnect switches.
Motherboard has a story that posits that this change is a security risk, but I think that’s overblown.
Toggle switches turn things on and off. Your computers should do what you tell them to, and Apple’s redefining of what a toggle switch means for something as fundamental as a computer’s networking functionality is, in my opinion, disturbing.
Turning off Bluetooth and Wi-Fi reduces your exposure to potential attacks to hardware, firmware and software, so “it’s good practice,” Barisani told me.
I do this all the time, which has the added benefit of giving my devices even better battery life.
Just last week, security researchers revealed the existence of a series of bugs in the way some operating systems implemented Bluetooth that allowed hackers to take over victim’s devices as long as the Bluetooth was on—without needing to trick the user into clicking a malicious link or do anything at all.
I’ve already re-trained myself to ignore Control Center and go straight to Settings, but most people won’t do that, and Apple knows it.