I didn't see anyone mention: In 2022, Ford sold about 47,000 Mustangs (excluding the Mach-E EV variant). So the impact of this particular model remains fairly small.
Frankly, if there will be widespread power outages for months, I'd be much more concerned with access to a firearm than AM radio.
I live in 9 point earthquake territory. Wnen it hits -- and it's a when, not an if -- the cell system will fail. It may last a day or two, depending on whether most of the towers survive in the most affected areas. Every cell phone has a battery, and that battery depends on power, and there will be no power. Every cell phone depends on the cell towers, and they have limited battery capacity, even for emergencies.
FEMA has stated that when that earthquake hits, power will probably be out in many areas for several months.
Frankly, if there will be widespread power outages for months, I'd be much more concerned with access to a firearm than AM radio.