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We have computers tho. The idea that it is hard is laughable. Why can so many cars have fm and am with non visible antennas and work fine?

Don't cars still put antennas on the roof? The stubby, rigid kind?

Not all cars have systematically antennas on the roof, you have other types that are "invisible" : https://improvecaraudio.com/where-is-car-radio-antenna-locat...