Good point. When I started listening to CHR (Top 40, as it was known then) stations in the mid-'60s, just about everything played was current -- all either peaking, rising or dropping. Recurrents basically didn't exist; when a song was through with its run as a hit, you'd never hear it again. And gold was limited to perhaps one song per hour, plus weekend specials. Country stations were the same way when I began listening to them in the mid-'70s. Things are completely different today. Today's 25-year-old country listener is hearing not only today's big hits, but recurrents dating back a couple of years and plenty of gold that dates back to the '80s and '90s, before that listener was even born! CHR and Hot AC don't go back that far, usually, but there's still a lot more non-current music being played in both formats than was the case decades back.