Our image of nostalgia was invented in the 70s when you could stereotype old people as the folks with big band music in their record collections. Fifty years later, the folks who were young when punk was young are, somehow, thought to be into big band music. We don’t really have room for new old-people stereotypes, I guess. Or, maybe, what was current for the young in the 70s is still current for the young in the 2010s. The bands change but the genres remain the same, so the old stereotypes persist — nothing has come along to disturb them.