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I'm not sure that self driving cars will solve the expense problem. Cars are incredibly expensive to buy, insure, drive and maintain. Sure self driving cabs will make some dent in the expense, but I'm not sure it will be cheap enough to make sense taking a self-driving cab to work five days a week.

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"but I'm not sure it will be cheap enough to make sense taking a self-driving cab to work five days a week."

Take into account the economic bifurcation of the country, we have no shortage of (wasted) potential really cheap human drivers.

A world where a cab driver is a middle class job is probably too expensive to take a cab everywhere unless you're in the higher upper class. But if there's only 100M jobs for 300M+ hungry people, no problem creating a permanent underclass living in misery to drive the few remaining middle class to work, until their jobs go away too.

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