I have to wonder how useful this unlimited data plan will be in 10-15 years when you're still driving the vehicle. What are the chances Chevy is going to even have an option to upgrade the radio when the one built into the car is obsolete?
My coworker's <10yo Nissan Leaf has a now-useless remote access radio, because it depends on the 2G network that AT&T shut down. $300 for an upgraded radio, which is a lot to drop on something that didn't break.
If they had offered it 10 years ago when 3G was available in most places, it would still be pretty useful today. 3G is good enough for 95% of what I use mobile data for.
Ten years isn't that long in a car's life though.
AT&T and Verizon are making noises about shutting down their 3G networks in about 5 years. There may be some feet dragging from important customers, but 3G is not long for this world.
Definitely feels like you're getting locked in. Sort of like buying a combo stereo unit with radio/phono/8 track in to one box instead of buying separate components that could be swapped out.
Good points, ATT is planning on sunsetting 3G next 3-5 years and move everything to 4G. So it wouldn't surprise me if 4G gets dropped within the car lifespan.