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That is legit worrisome :)

At first it will be limited to the rich as time goes on and the technology improves it will become cheaper and more accessible.

That might be a bit optimistic. With AI, advances in robotics, and life extension, the powerful might decide that they just really don't need us proles anymore. I don't think either outcome is guaranteed.

Just look at what has happened with every technology before. Most people have computers, cars, phones, etc now.