This reality seems like it may pose a problem though, as some people's business models and valuations depend on this article being wrong.
The thing is, we don't need full level 5 to get useful stuff out of this line of tech development. But in terms of the futurist vision of driverless cars everywhere, fleets of cars replacing private ownership, etc -- hard to see that happening. If the tech takes more than 10 years to develop, it's very likely something else will develop in the meantime which will essentially invalidate all of those earlier visions, as the world will have gone in a different direction in the meantime.