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You should be able to intercept inspect and modify any data in any device you own. I’m not even sure what the reason for locking things down really is anymore. It isn’t any more secure as hackers breach into these things routinely anyhow, and everyone running the same software expands the risk envelope and reward of hacking greatly. It turns power users away who might have added to sales just buying your product to use as a dummy sensor for some other purpose vs the ones marketing come up with.

So it is arguably more dangerous and leads to fewer sales. But again businesses don’t take positions that are rational if they can take an irrational position that every other business in the sector also takes and therefore easily justify to shareholders without having to present actual numbers they might reject anyhow.