> It’s sounds so dangerous! What if they lost internet on a bridge? People could really get hurt.

There's actually system to do this, and I'm also amazed that this is legal. In this case though it's not that, it's simply that to unlock the car it go through a data connection. It won't shut itself, you just won't be able to unlock it without a data connection.

It's unclear but the article mentions they went for a hike and when they came back, the car wouldn't start. I don't think they can shut down the car while it's running.