As someone who watched a lot of films while researching my movie book, IMHO the Golden age of the Hollywood musical stretched from 1933 with "Gold Diggers of 1933" and "42nd Street" through 1969's "Hello Dolly", (the last old school musical), peaking of course with 1952's "Singin In the Rain". I'm not sure we've even had a silver age yet, and although there have been a few outstanding musicals since like "Chicago", "Moulin Rouge" and "La La Land", I'm afraid the musical is pretty much dead as a film genre for the foreseeable future
As someone who watched a lot of films while researching my movie book, IMHO the Golden age of the Hollywood musical stretched from 1933 with "Gold Diggers of 1933" and "42nd Street" through 1969's "Hello Dolly", (the last old school musical), peaking of course with 1952's "Singin In the Rain". I'm not sure we've even had a silver age yet, and although there have been a few outstanding musicals since like "Chicago", "Moulin Rouge" and "La La Land", I'm afraid the musical is pretty much dead as a film genre for the foreseeable future