^ I'm not sure what you mean when you say almost nobody here shoots anything that would 'warrant' anything more than an IPhone. That's a huge leap in the assumption of what people like and appreciate! It's also a hugely subjective opinion that what you've seen doesn't 'warrant' anything more than an IPhone. I just think that's an amazingly silly comment. Wasted technology, I think not. For you maybe. You may think that only feature films 'warrant' this high quality acquisition equipment. I surely don't. I want everything and anything I shoot to be in the highest quality possible, shot by equipment in my price range and size.
You'll never get the PQ from an IPhone that you can with a good dedicated HD camcorder. You certainly won't get anything nearly approaching the quality of a 4K AX100 or GH4. Not even remotely close.
Now if you're someone (and I'm sure there are those on AVS) that doesn't appreciate the huge differences, then yes, stick to an IPhone. I for sure am not one of them. I'd rather shoot a stack of books on a good quality 4K camcorder than an IPhone.