I'm wondering how the shut-ins working from home are going to tolerate listening indefinitely to the tight-playlist stations after being cooped up for any inconvenient duration.
The concept of Top 40 radio and tight playlists came from listening to a jukebox in a bar, and realizing that the patrons had a fairly predictable, short list of favorites they enjoyed listening to over and over again. I don't know if that story is true, but I've seen it played out many times in many bars. My particular favorite place had one of those jukeboxes, and I can't tell you how many times I heard Patsy Cline's "Crazy" played. It wasn't anywhere near a current song at the time. And I noticed that it wasn't just one person who played it. And every time it played, the people in the bar sang along. I've been to countless weddings, and the music at these weddings (whether done by a band or a DJ) is pretty predictable. Today, with streaming services offering users millions of songs, I look at the streaming charts, and those user playlists are generally smaller than the ones radio stations use. So I don't think the size of the playlist a radio station uses will make any difference. What matters is the specific songs they play.