Ok, I’ll try to make it simple: disabling WiFi uses more energy. Your WiFi is used for location service instead of GPS. Even when you’re not on WiFi, triangulation with other WiFi routers makes it much less battery-draining to set your location instead of relying on GPS all the time. If you turn WiFi completely off, your GPS will be used in every single instance that location is required. So, no, it won’t save you energy, it will actually drain more of your battery.People want the option to quickly disable both, for reasons of saving power and for security. Is that so hard to understand? It is not a mistake. I want both WiFi and Bluetooth completely off while I use my phone's GPS, which is a glutton for energy, when I hike for instance.
As of Bluetooth, it USED to use a lot of energy. Since Low Energy Bluetooth was adopted, less than 2% of battery is drained by keeping it on at all times. Also, many of the perks of Apple’s ecosystem (namely, Continuity, Hand-off, Apple Watch, AirPods, AirPlay, Apple Pay, Apple Pencil, password sharing, HomePod activation, Apple TV Remote prompt) rely on Bluetooth. So, no, Apple should NOT make it easy to disable it - lest people will complain that ”Continuity doesn’t work”. You can’t have a tight ecosystem and allow people to easily disable part of its functionality and still have it “just working”. Apple is right, with the decision to just disable WiFi and Bluetooth instead of turning them completely off.
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