Brown said everyone needed a better stereo in the 1990s. Factory radios were lousy. But the aftermarket stereos that people bought to replace the factory-issued ones could easily transfer from one car to the next. For example, if thieves steal the factory stereo from a Volkswagen Jetta, they're going to need a buyer with a Volkswagen Jetta, and all a thief can offer is the stereo the owner had to begin with.

Factory stereos got good (and complicated). Aftermarkets got cheap.