I don't think that it's just a question of youth versus age. I think our nervous systems change over the years.

I'm thinking about how when I was a kid, I wanted my music very pure and in tune. I was unusual - I liked classical music, as played by fine symphony orchestras. The sound of a fiddle or a pipe organ irritated me. Those instruments moved too much around any given note.

In my thirties, that began to change, and now I enjoy these instruments. I even enjoy the Beach Boys' "Barbara Ann," though that is as far as I'm willing to go with those guys.

Still can't stand the saxophone, though.

Not enjoying old music can also be a question of greater sophistication. I heard an old Pat Boone cut recently, and it was so obvious that they had tried to make a weak voice seem stronger than it was. Sounded like he was singing into a huge, empty barrel. For some reason I never noticed this at age 13!
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Too bad about Squirt. Squirt was the only soft drink I liked.