we always go through format changes on the FM radio stations with few exceptions every year or two. It is like they cannot make up their mind what format to play. A station that used to play 80's music may now play Rap or Jazz music. I think the same owners own most of the St. Louis Radio stations and then shuffle the formats to try and reach new markets.
I only listen to radio stations in my car, when I am not playing a CD or having the radio off.