>>211859097 (OP)They haven't died out, they died down. I know they were way more prevalent during the Hays code era and Oliver! winning the Academy Award was Old Hollywood trying to keep the revolution down but after you have movies like Midnight Cowboy and the Godfather a winning best picture, musicals become more and more niche. But yeah, the last musical I remember making noise was Wicked part 1 and it wasn't exactly up against of other musicals.
But on the flip side, remember when Glee and High School Musical were everywhere and you couldn't escape fucking gay musicals? So cool those days are dead.