Whose 70s were those, anyway?

60s, 70s and 80s nostalgia pieces, like this website, always make me wonder if I'm on the wrong planet. I was into bluegrass when everyone else was doing disco, and I wouldn't know the Bay City Rollers if one rolled over me. Oh, well, if I didn't get it the first time, I guess I'll be spared the pain of missing it now.