Music has been a part of my life for a very long time. Long before I got to the radio business. I spent decades collecting cassettes, and begrudgingly adapted to CDs long after most people did. But when Spotify launched in the US in 2011, I signed up. I have a love-hate relationship with streaming. I miss holding something in my hand, reading all the things that came with physical media. But I do enjoy how Spotify has turned your listening habits into a data-driven experience. At the end of each year, they give you a stats package called Wrapped. And this year, they added a new stat, your listening age. And in just a few days, people are buzzing about it…