Here's a much better explanation of the issue than the piece BMW put out.
https://www.lightreading.com/iot/ata.../d/d-id/765442
The technology that supports the communication aspect of CIC or NBT is/was on a 3G AT&T platform that goes back to 2001. AT&T began upgrading it in 2009 to 4G, and then in late 2019 to 5G. The CIC/NBT Connected platform was obsolete the day it was installed in the first BMW.
The very definition of planned obsolescence.....