Kind of strange - more people are cutting the cord and getting antennas, yet broadcast TV is “waning in popularity.”
Or perhaps it is that the garbage NBC (and other Big 3 networks) is airing is waning in popularity. I am actually watching mostly the subchannels during those times myself.
I will say though it’s still fun to watch those late 60s early 70s programs where the networks would preview their new fall shows.