An NYT investigation into the 2008 Universal Studios (Hollywood) recently discovered that over half a million irreplaceable musical scores and masters were destroyed in the fire that happened about a decade ago. This is contrary to what the studio itself claimed at the time (that everything had already either been backed up or digitized, and that most of the contents were just TV footage anyway).
https://tonedeaf.thebrag.com/music-fire/
https://tonedeaf.thebrag.com/music-fire/