In the periodisation GP is referring to, I believe Boléro would be Modernist, not Classical. The latter [0] refers to works by e.g. Mozart and Haydn, and followed the Baroque period of e.g. J.S. Bach.

(Incidentally, I do find Classical music quite repetitive — although on the other hand I’ve long enjoyed Boléro. Curious!)

[0] https://en.wikipedia.org/wiki/Classical_period_(music)

At least you can avoid bolero pretty easily. The real disaster is canon in d...