plus when i was a kid in STL the local R&B radio station had 'Wayback Wednesdays' where they played nothing but R&B/Soul oldies all day. i got my education about older music from listening to that. then when i moved here it continued w/a similar radio show on Sundays here in Chicago.
who listens to radio now?
AND...of course. there were more samples of older music in then-current Hip-Hop. those records often sent me off in search of the sampled source music. i got much of my education about older music that way.
there's much less sampling of older music now. b/c it's much more expensive now than it was then.