Agreed. The problem is GM doesn't get any subscription fees from this arrangement. They want money. MORE money. Sure, you may still be able to BlueTooth to your phone for calls, but I doubt much else will be available. GM will make you subscribe to their GPS system(which, of course, only to sell your data to the highest bidder in addition to collecting a monthly fee from you). This is just Greed, pure and simple.
I have a connected Nissian, and stopped paying for it because it didn't really offer much. The ONE THING that might have been useful was remote start. But for the time it takes to open the app on my phone, get authenticated, find the remote start button, have my phone send the signal to Nissian, and then to my car.... well by then, I had already made my way from whatever business I was at all the way to my car. For me, it was a waste. My wirelessApple's CarPlay does everything I want it to do.
Money... you just can't own anything anymore. Everything comes with subscriptions.