The ARRL does not control this.
The FCC does. And Congress controls the FCC.
So you should make your concerns known to both.
-Mike.
The FCC may have some control on how much interference a car can produce before it can step in an "suggest" corrective action.
If we judge by the fact that you can tell when you are driving by a starbucks by the amount of interference on both AM and FM bands the FCC may not do much.
The FCC has no control of what a car manufacturer decides to "amputate" from a production car.
There is also a good chance manufacturers may have their decisions "influenced" by satellite audio streaming providers.
As far as TESLA is concerned, if the car already has an internet connection, OTA reception becomes secondary and they may get to charge a couple of bucks extra for using this connection to stream "radio".
It's 2022 and having that huge LCD screen in the car is screaming to be the display and control for an all band all mode HAM Radio, if only there was a way to tap into it!
On the positive side, if the AM broadcast band is no longer used for public broadcasting, can we have it ?