Decades ago Letterman had a daytime show on NBC. It ran throughout the summer of 1980 and was the funniest show on TV. It started as a 90 minute show but was reduced to 60 minutes and ended in the fall. I used to watch it with my mother.
The early Late Night was also very funny. He had a golden TV spot with no competition and could have stayed at NBC with as much $ as he ever would have wanted, but his ego and desire to concur at 11:30 forced him to be stupid and narcissistic. He never consistently beat Leno and it fed into his already disturbed sense of inferiority.
What the networks refuse to acknowledge is they automatically turn off 50% of their audience with these unfunny libs.
Leno went to the center and he now has all those viewers the libs don’t want.