Is this trend the result of cash for clunkers or pure raw nostalgia?

Does anyone remember cash for clunkers? Could it be a reason. . . or the trend is just pure raw nostalgia?
a wistful desire to return in thought or in fact to a former time in one's life, to one's home or homeland, or to one's family and friends; a sentimental yearning for the happiness of a former place or time: