When sister #1 went to college in 1980, she had a stereo with turntable, 8 track and cassette.
Next year sister #2's stereo just had a cassette, no 8 track.
So some time in the early 80s 8 track died.
my parents had a stereo contained in a piece of furniture in the living room that played records. i did not go to college with a stereo, i was born a poor white child : )
My guess on 8Tracks is going to be more mid 70’s - I think cassettes were out by late 70’s