The Borgified Corpse wrote:
... In the meantime, FOX, the CW, UPN, & the WB never had any 10pm programming to begin with, yet no one is talking about that.
Out of your four examples, two don't exist anymore (UPN & the WB merged to form the CW, remember?).
Leavin' just FOX and the CW...FOX started out as a light network, that, back when it first hit, I couldn't even get 'cause I lived too far from D/FW!
And the CW had to be created from two other light networks - I still remember when I was in college and could watch the WB programmin' durin' the week and UPN programmin' on weekends, 'cause that's how the one channel both networks used scheduled it.
NBC has alwasy just been NBC and its days as a network go back longer than any of us do!