Say you could accelerate a ~1g camera to 0.2c. I don't know how to do general (hard) AI, but if I did, I can't think of a fundamental reason I couldn't shrink

Say you could accelerate a ~1g camera to 0.2c. I don't know how to do general (hard) AI, but if I did, I can't think of a fundamental reason I couldn't shrink the AIs down to ~1g and make them able to survive 60,000G. So you could send a bunch of AIs on a 20 year trip to Alpha Centauri. I would imagine Stephen Hawking has already put two and two together in this way; he often warns that humans should leave Earth to avoid extinction. Even if we can't colonize other stars with people within this century, AIs could be thriving there within that timeframe. At least our "descendants" (the AIs) would be protected from extinction (by redundancy across stars).