My alternative possible timeline interpretation is that two forces collide and make self-driving inevitable.
The first force is the insurance industry. It's really hard to argue that humans are more fallible than even today's self-driving setups, and at some point the underwriters will take note and start premium-blasting human drivers into the history books.
The second force is the power of numbers; as more and more self-driving cars come online, it becomes more and more practical to connect them together into a giant mesh network that can cooperate to share the roads and alert each other to dangers. Today's self-driving cars are cowboy loners that don't play well with others. This will evolve, especially with the 5G rollout.