But answering as a hypthetical roomba owner: As I am from the EU, this new ownership would actually be better for me. The US already mandates spying with devices like these, and has been caught multiple times doing so already. It is also known to share info with the domestic services, the latter point not being true for China.
China absolutely shares info with all of its national police services, intelligence services, and military. Depending on the company these PLA may literally own some / most / all of the organization.
I am not in the US or China, and on balance I am less worried about the Chinese blowing my house up, but don't pretend they're nice, or that they're your friend. I don't want them having my data any more than I want the NSA, Research & Analysis Wing, or the NK Reconnaissance General Bureau.
Again, the root problem of course is that there is any data to share in the first place.
Depends on where you live. If you are living in North Korea and somehow you got to own a Roomba, it would be surely a bad thing.
But living in a western country, I would hands down prefer giving all my secrets to the North Korean government instead of my own one.
As an American, I'd much rather a Chinese company have data on me than an American one.
The American government and FBI and police don't have access to the Chinese company's data. But with a subpoena (and sometimes just with a friendly ask), they sure do have access to an American company's data.
Now if the US is at war with China and you're a politician or in the military, then of course get rid of every device in your home and workplace from China that could be used to spy. But if you're just a normal citizen worried about your government collecting information on you, it seems preferable to stick to foreign companies, like Chinese ones.
