I've always left wifi turned on in my watch, because I never had any reason to turn it off, but it has occured to me that I'm not sure if there's any point in having it on. Perhaps I can reduce some battery drain by just leaving it off? I don't use music at all, so I'm not sure what other purposes wifi might serve that I'd lose if I turn it off. I know firmware updates and activity sync "can" use wifi, but they can also use bluetooth, so it seems unnecessary to keep both turned on, no?