> A car doesn't need data updates, and definitely not code updates

I don't think this is accurate. Many advanced driving assistance capabilities need access to updated map tiles, which is a data update. They may need code updates to fix errors or shortcomings that can be detected only after deployment on extensive fleets or in response to changes to the environment/infrastructure. This is just one example for why data and code updates are needed.

I think it is more accurate to say that a "dumb" car with mostly electro-mechanical systems doesn't need data updates and definitely not code updates. But that isn't true for vehicles built within the last few years and definitely untrue for vehicles that will be built in the coming years.