One thing people might not realise, is that memorable old music can come and go. Until someone recorded a successful rendition in the 60's, Cannon in D had been forgotten for centuries. Now it's almost synonymous with wedding music, and seems completely timeless.
It's possible everyone will be crazy about 1919's El sombrero de tres picos in 2450, and (with this all being indistinct distant history) will picture us in 2024 playing it on boombox at a 2050's-style holo-orgy.