Automotive technologies, even technologies in which the sponsoring companies are heavily invested, are not eternal. Just off the top of my head here’s a list of automotive technologies tried and then abandoned for one reason or another:
the Wankel engine
early electric cars
the first talking car (Datsun 810 Maxima)
automatic shoulder belts
and my favorite, the Ford Nucleon—a nuclear-powered concept car. What could possibly go wrong?
Some of these technologies have been introduced again and again only to be abandoned each time. So, simply because a car company or even many car companies have invested billions in development of something, that doesn’t necessarily mean it’s here to stay.