One of my favourite annual traditions in the National Post‘s Arts & Life universe is the end-of-year Cultural Lessons. They’re essays in which the writers meditate on what they learned from popular (and I guess not popular) culture over the year. I suppose it’s our chance to tell you what we really think. Anyway, published Tuesday, here’s my one and only for 2011, about how fortysomethings made a lot of the year’s interesting music — meanwhile, the young folk not so much. Illustration of an aged-looking PJ Harvey and Jay-Z by the talented, nice-smelling Steve Murray.