1940: The advent of FM and the war between music and serials

In 1940 there was a split among radio listeners.  A war erupted between the daytime preferences of music listeners vs serial listeners.

Apparently, Mrs Housewife of 1940 was a big daytime radio listener. While some listened to serials on the AM dial, you had another bunch (very vocal, anti-serialists) who were happy to have the advent of the new FM dial, where they tuned into hit records all day long.

It's pretty apparent that when the husband came home, the radio was usually left on the AM to hear the likes of serious dramas or comedians.