Dude, you have to at least know your numbers to have an intelligent discussion with me.
The data shows people don't switch from Apple. Despite a revenue shortfall, Apple grew 100M active users during the last 12 months. Apple doesn't have "fickle" customers. Quite the opposite. This is one reason services are growing at 25% y/y. People don't switch just because they aren't upgrading. They are holding on to their iPhones for longer, but they aren't buying Android phones.
Battery replacements still were a minor impact. It was clear Cook was emphasizing the slowdown in China. In fact, he TOLD us to what extent with this quote:
"In fact, most of our revenue shortfall to our guidance, and over 100 percent of our year-over-year worldwide revenue decline, occurred in Greater China across iPhone, Mac and iPad."
Flatly, you're wrong about China, at least historically. It was growing nicely every quarter until this most recent guidance revision. As recently as the numbers reported in November of 2018, China revenue grew 19% sequentially and 16% y/y. I can understand why Apple was surprised, because China had performed so well even through the most recent quarter. China manufacturing numbers came out and they were terrible. China has slowed down significantly as of late and it happened very quickly.
This is a short term problem for Apple, but China has proven to be a very popular and high growth market for AAPL as I just pointed out with hard data.