When you first asked how many would recognize that song, my reaction was something like, "Well....... everyone knows that song". But it is fading into the past, isn't it? Maybe youngsters might not recognize it.
Something similar happened to me just a couple of days ago. Out of the blue I got the urge to hear "American Beauty" (The Grateful Dead) again. I don't own a copy of it so I looked it up on youtube and played it. One of my children, 22 years old, listened along. If she'd not recognized "Sugar Magnolia" or "Ripple", it wouldn't have surprised me. I didn't ask, though.
But when "Truckin' " came along I asked her if she recognized that one. She didn't hesitate long at all before saying "No".
That did surprise me. It doesn't seem all that long ago when you couldn't turn on the radio without hearing that song. Everyone knew that one.
We gotta face it. The time has passed and our culture might as well be dinosaur culture as far as the youth of today is concerned.
Oddly enough I don't feel as saddened as I might. But it wasn't all that long ago that the youngsters had some understanding of our music and attitudes. But I think maybe those days really are gone now.
We've become senior citizens.