I've often considered that.
In the 50's they used to cite the great MGM musicals as examples of escapist movies. Now if you look at what is escapist cinema, it is something very different. I'm never quite sure if that's a good thing. But at the time, a lot of actors did a stint in a musical once in a while (well, they were under contract and did what the studio told them).
Also, I don't really like musicals a lot, so this isn't me advocating for them.