Many of those vacuum cleaners have cameras, can move around on their own, and are connected to the Internet. If they're taken offline, they stop working. Many have microphones too.
The new Chinese owner will get control of a network of tens of millions Internet-connected, autonomously mobile, camera/microphone-equipped robots already inside people's homes and offices.
More than 40 million is a lot. For comparison, the US has ~132 million households.
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[a] https://www.ft.com/content/239d4720-aee4-443d-a761-1bd8bb1a1...
From another angle, the iPhones are primarily made in China AND India via third-party factories, so no one should ever use iPhones any more.
You have the right to concern about privacy, but that's not how it works.
The tables of scores strongly speak to increments.
[Edit: it's what the original article says. Not the OP's fault]