Okay, but you have to accept that this is a ridiculously small minority use case.
If the icons were consistent and there was a setting to toggle the behaviour of Control Centre then it would be a non-issue. I could set it up the way I want and it would work as it used to in iOS 10. But the icons are inconsistent and, as far as I know, there's no such setting.
"I don't accept that."
Addressing the strongest possible reading and all that.
> a non sequitur about it being a "common sense approach."
Just read "common sense approach" as "that makes sense to me" and it fits perfectly. As for common sense, ask random people on the street what they think turning something "off" means. Do you think you'll find even ONE person who says "oh, that probably means it'll stay off until I change location, or until 5 AM, whatever comes sooner?". That's the elephant on the couch.
The use case of what you or most would find convenient, and would prefer to have available with one touch instead of more, is completely orthogonal to what all of this is about -- the common sense of what any normal person who isn't bent on defending Apple just because would respond with 1000 times out of 1000: of how to read UI in this case. Consider it a use case for the UI, and to even suggest just one person actually has the use case you declare to be such a majority they must be catered to without any further investigation (e.g. if the majority is wrong, that should strengthen, not weaken your resolve) truly is ridiculous.
I have a smartphone that offers reasonable controls on cellular data use on a per-app basis, in addition to easy system-wide toggles for WiFi and cellular data. It's easy for me to keep cellular data off most of the time, as I'm usually within WiFi range or taking short trips (eg. grocery shopping) where there's no inconvenience to being offline for a while. As a result, I get great battery life out of my phone and don't need a multi-GB data plan unless I'm traveling for most of the month. The TCO for my smartphone is a small fraction of what's typical with an iPhone on a major carrier, but I have full access to the capabilities of my smartphone and its LTE connection, when I decide to use them.
I'm a bit dubious about this - in fact, turning off WiFi would actually harm battery life, surely, compared to LTE?
I'm kind of fascinated to hear from people who spend money on things only to disable all of the things that make the thing worth spending money on.
If someone tried to tell me that the default behavior of a product should be to not function, I think I would go through the roof.