Things I want in an OEM receiver: 1) Carplay/Android Auto, 2) Software updates for 1, 3) Radio, 4) To never do anything else (call me, install bloatware apps, reorder menus, etc).
Well, you're stuck with the car by the time this kicks in...
And, apparently, the OnStar experience has just recently (<12 months) gotten quite horrific--apparently it used to be an online thing but that wasn't intrusive enough. I made the salesman sit with me while I was signing up (Okay, you want your commission from this, you get to spend your time.). Verbally. Over a shitty, high-latency, low bandwidth voice connection.
The salesman sat there visibly appalled. The salesmen got his manager. The manager got somebody else. etc. By the time I was done, I had 7 different people from the dealership listening with shock on their faces.
Big manager: "Ummm, yeah, this is a problem. We are strongly encouraging our customers sign up for something that makes them angry. That's ... not good."
Apparently, nobody at the dealership had experienced a signup in the last 12 months.
I'd say your car purchase was an awesome experience.
Unfortunately, though not a subscriber, my car stereo often defaults to the Sirius input when I start it. This mean I'm greeted with Sirius ads when I start my car. Usually, this ad literally consists of playing a really annoying buzzing/screeching sound, followed by someone explaining that if you subscribe, you won't have to listen to that sound. That's an .. interesting .. strategy.
I am still pissed off about the lengths I had to go to in order to stop receiving communications from them. They refused to remove my contact information from their system and could not promise I wouldn't be contacted again in the future. I had to ultimately change all of my contact information to false information, fortunately the guy I was talking to was sympathetic to my plight and had no objections testing out the system to see what BS info it would take.
The whole escapade landed them on my short list of companies I will never do business with ever again.