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If he uses his phone via Bluetooth then he doesn't need to pay the $15 connect + service. I think you're a little confused or not understanding this correctly
My post was in response to the article (for which the data almost certainly came from Rivian) that said:

Despite implementing Apple Wallet car key support, Rivian remains opposed to CarPlay. The electric vehicle maker does offer a built-in Apple Music app with a Connect+ subscription, which costs $14.99 per month or $149.99 per year.

This is clearly intended to say that this feature is a replacement (at some level) for CarPlay. My point was simple, even were it free it would be an inferior experience to using CarPlay to pull my music from my iPhone, and at $15 a month it is a much inferior experience. You can keep trying to justify their anti-user policies, but you are unlikely to convince most CarPlay users.
 
I have an internet connection on my iPhone for which I am already paying. This is just a money grab. Instead of letting me use my iPhone and its connection, I have to pay them extra for an inferior experience (no continuity by itself already makes it worse, assuming everything else was equal).
You can use your iPhone via Bluetooth at no extra charge
 
In summary, in order to be able to use my Apple Music subscription, for which I am already paying, I need to pay them $15 a month. No wonder they do not want me to have CarPlay. Currently in the market for a new car, one I can check off my list.
All the car companies are starting this subscription-based garbage. It's ridiculous!!
 
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