Because of the way most popular music is consumed? On ear buds doing something in addition to listening to music on a vast shuffle play rotation. Less down time for a song to take 10-20 seconds to fade as opposed to just ending in an instant gratification culture. Just a theory.
It would be interesting to find out how many songs end with distinct outros like ‘cinnamon girl’ today.
Freegards
How many songs end with the drummer saying “That’s gotta be the one, then, Ay?”