Yes, I thought exactly the same thing about ten seconds after I posted, Jack!

But my point remains true, AFAIC - that what we know as the Oral Tradition evolved because it was a readily available system of passing songs on at that time, but it is a method which has been consigned almost entirely to history (in the developed world, certainly) by the technological advances of the past sixty or seventy years.

Technology is here to stay. The Oral Tradition, sadly, can't compete as a methodology for musical transmission.

Usual disclaimers apply......IMHO, YMMV etc.