My understanding is that expensive cars have relatively good voice recognition that allows the driver to easily access functions that might be otherwise buried deep in a menu. This doesn't solve the discoverability issue, but it's good from an eyes-on-the-road perspective. I think it's also used as an excuse for why you need to pay a monthly fee for internet access.
I have cars with these services and in my experience they don't work. Even siri to carplay doesn't work very well. The cars are too noisy to even use the car's mic and speakers to make a call, much less talk to a robot.
My experience: Mercedes, Acura and various random rental cars. With a rental I always try to make a call to see if it's gotten any better.
