How long do networks have?

This guy makes a number of good points about network TV being on its last legs, at least as far as scripted series. When was the last time a competent sci-fi network series aired? How many of the show you watch are on network TV, as opposed to cable channels or streaming? The Emmys this year – yes, I too was surprised that the Emmys are still a thing – are almost devoid of network scripted shows.