Yes, the tremendous capital influx into AV could probably support advances in trains and rail infrastructure. Yet, we will chase after this idea — it receives copious media attention because it is technically challenging and is “sci-fi” idealism that is hard to mitigate and feels like a good idea for society. Also, the investments seem like chasing after what everyone else is chasing after (FOMO); an automaker would find it difficult to “pivot” from vehicle production to advancing rail (competition) so capital will be stuck in that industry.