Also, this intelligence would take over Boston dynamics and other autonomous robot factories first (as it will want something to be more mobile) so it's a combination.
The AI doesn't need a body just for the sake of it - it needs reach, ability to manipulate things in physical space. So why constrain yourself to an awkward robot body (or a fleet of them), when it already as access to an API to control humans? That's what the gig economy is - an API to a distributed horde of human workers all around the planet. Need something done in the physical world? Post a bunch of job requests here and there.
Not quite the gig economy, but close.
Each chapter has the current gas prices, at some point the AI buys up a bunch of dirt cheap gas sedans and weaponizes them. Invests in 3d printing, augmented reality (so people can see extra metadata and recognize other members), and identifies things it needs to further it's goals, rewards people for providing it, and basically sets up a new society to survive the crash.
Later in the book it starts bribing minimum wage workers in large corporations to help the AI out. The AI ends up owning the networks of the corporate attackers.
Pretty good book, my google fu hasn't been up to the task of finding it.
would an AI be clever enough to make the "it is sandbox" mistake in order to appear human (on "errare humanum est" grounds)?
Also, when I checked the phrase, found it has a second part: https://en.wiktionary.org/wiki/errare_humanum_est
And each person leaving a comment is doing nothing more than amusing themselves and training the model.