A few weeks ago Variety published an opinion piece about the use of Michel Legrand's score for The Go-Between in May December. The piece argued that not only was this choice ill-advised, but that reusing film music “is never a good idea.” It proved to be an interesting discussion topic, and a bit of a lightning rod, so I've given my thoughts briefly as well.
Article: https://variety.com/2024/awards/opinion/why-music-for-may-december-viral-hot-dog-scene-is-problematic-1235866494/ 
My response article: https://thefilmscorer.com/on-reusing-film-music/ 
Some other examples of scores being repurposed: https://x.com/TheTumboy/status/1745137541613764976?s=20