Years ago, (early 1980's) I attended a telecommunications seminar. There was an American speaker, who foretold of the "raspberry jam" effect. He said telecommunications and the entertainment industry would converge and result in many channels for TV, radio etc.
He said that there are a given number of good writers, producers and performers, so a limited number of high quality output is possible. When these are concentrated into a few channels all output is high quality. When you have a lot of channels, then the fixed number of hours of quality output is thinly spread (like raspberry jam) over the many channels and the rest of the hours filled with mediocre output.
He was right.