I’m opposed to it, if the argument is basically “for emergencies”… then putting an emergency radio in would be better. At that point, just lump into the spare kit or something.
Nobody in an emergency is going to think to use something that they don’t use in every day life. Having AM radio in cars is… not going ti be useful. (EAS goes out on FM amd say radio, too, and there’s the WEA sent to cell phones for people younger than dirt.)
and if SHTF, powering a car is going to be difficult. You basically can only rely on the gas in your tank and what you keep around for the lawn mower (if that.).
Most emergency radios are designed with minimal power from the get go (ie battery operated, recharged via hand crank or portable solar, etc.) and can usually be set to automatically come on if the EAS sends an alert.