Try this movie- you'll like it

In Hollywood, as in life, it's easy for people to get typecast. If they do one thing that works really well, they can get stuck in that role forever. The studios didn't like taking chances. If they hit on a winning combination and/or formula they stuck with it; often long past the time everyone else (the actors, the audience, the industry) was ready to move on to something else.

That kind of stuff still happens today. That's why I think we end up with a lot of very crappy movies. Making movies is so costly when one movie works the tendency to make a gazillion, usually very bad, sequels is tremendous. For the most part, they're all basically the same movie with a few changes here and there like a new villain, new location(s), new obstacle, etc. Audiences even come to expect the same kind of stuff even though they pretty much know what the plot will be.

I read in Eddy's bio that years later he and MacDonald were offered eight more movies but they declined. Hollywood was going to beat all the pulp out of this pairing. Having seen only about half of their movies, it seems the earlier ones were a lot better. In later years the studio seems to have thrown something together and put them in it without regard to the quality of the story and the script.