Here‘s a take on Didi’s troubles in China that I haven’t seen here, and which may help explain concerns around Tesla and other companies collecting data in China:
Didi’s removal from China’s app stores marks a growing crackdown
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Briefly, the concern may not be about privacy, nor data locality — rather the Chinese government might demand access to all the data Tesla collects in China. Would Tesla be willing to comply, thus becoming complicit in China’s use of that data? Suppose that puts Tesla in breach of USA law, crafted to punish companies that help the Chinese government repress its own people? This could quickly become political, and tricky.
That said, my outlook as a long-term investor remains positive.