And sadly this isn't even the case. I recently purchased a new car that came with the SiriusXM 3-month trial. We drop reception in the country and in town (among tall buildings). In fact, it drops more often than mobile internet (why doesn't XM have 10s buffer?).
The subscription is also more expensive than Apple Music or Google Play Music and the car comes with Android Auto and CarPlay. How they expect to compete is beyond me. I guess that's why they bought Pandora.