I like having access to my phone's functions (in particular my car's ability to connect to my iPhone for music), but I do not want to be forced to use my phone for GPS or any other functionality that can be built into the car. I know that built-in GPS systems are out of date as soon as the DVD is made, but I do not want to be forced to use my data plan for functionality that previously did not require it. I do not know how much cellular data the GPS would use, but having a built in navigation system currently uses none.
Car manufacturers, device and software manufacturers ( especially those ones who think everyone wants their data on "the could" ) please give us choices, not dictates. We like new features and ideas, but not necessarily new ideas that result in added, recurring expenses (fees for cloud storage, data usage and possible increased data plans because of the increased data usage).