It has changed. But your characterization that it is dying is incorrect. Radio isn't what radio was anywhere... not just here. There has been consolidation in that and numerous other industries. The growth of several towns as people move from very small to small/mid size towns is significant.
Farming and ag are more efficient than before. That means less people and some towns will "die" simply because fewer people are needed to do the business. OTOH, other industries have moved in besides ag and food. For instance a steel mill will open this fall in mid-Mo with regional impact. The county I moved from about this time last year in mid-Mo has 14,000 industrial jobs and a population of 45,000.
PS- are you from Arkansas and making this kind of assessment of mid-MO?