So back to the OP
I am 71 and had heard of the Cranberries And have heard the song Zombie but honestly it did not really stick .
So I think it's not so much "living under a rock" as choice of exposure platform
Many of us who came of age in the 60's kinda gave up on Pop radio by the mid 80's - 90's. so there is a fair likelihood that many may have not heard the chart toppers then, and now...
But I can definitely identify with the (The) Zombies
