This is true. I am surprised that firmware upgrades for cars don't automatically download when you connect your phone. At the end of the day it is only firmware so it should be freely available too the owners of the car.
If you have a Android 6 your phone is fine but you will need to get your cars firmware updated. I have a Peugeot 508 and it stopped calling when I upgraded to Android 6. But once I had the cars firmware upgraded to 2.86 all was good again