I bet it has a lot to do with the emissions certification of the class it is in. Same reasons why a lot of other diesels were late to market. The EPA's overly strict and ever changing diesel emissions regulations are making it harder to bring them to market. I bet the same will eventually happen to gasoline engine as more EV's come to market especially since nobody cares about these EPA regulations until it is too late and most just do as their told believing it is what is best for them without even verifying it.
