Been wondering that myself. What is the alure of factory GPS when you have Waze, Google Maps, Apple Maps and CarPlay/Android Auto? Only thing that comes to me is access to detailed maps when there is no service.Do you have an iPhone or Android phone? If so, you can use CarPlay or Android Auto. I specifically ordered my 2017 without nav knowing I would be using CarPlay. It's even better now that I can use Waze with it.