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I think you are confusing the current social and legal climate for self driving cars with what the technology can do in 5-10 years.

For example, if the law says "there must be a licensed driver ready to take control at all times" then it doesn't really matter what the technology can do.

It's easier to change the minds of men than it is to build a near copy of the mind of a man

Not sure why you're being downvoted. The transition to "digital rails" will surely be gradual, but it will come.

It works here and how and doesn't require billions of dollars in infrastructure investments.

The algorithms/hardware are hardly proprietary.

As long you're building expensive infrastructure, might as well build actual rails.