It's all too little, too late.
Millenials over here, if they do bother with getting a drivers license at all, cannot be bothered with a car stereo.
I see people driving around with headphones on almost every day, and in pretty new cars. Just yesterday I stopped next to a pretty new Volvo at a red light. The driver was 20-25 with a pair of huge headphones on, digging along.
That car for sure has the ability to play wireless from the dudes phone, but hey, he already had the headphones on when getting in the car, why bother?