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An example is an “acoustic guitar”. There was no reason for that term prior to the invention of an electric guitar because everything was just a “guitar”. Maybe it’s time to differentiate based on user interaction with a recall, but as it currently stands, they are all “recalls” just like acoustic and electric variants are all still “guitars”.
Also, it seems like we should differentiate between a software update that puts new features in your music app and one that fixes power steering.