In July, TBS announced that, after seven seasons, "Full Frontal with Samantha Bee" would not be returning, and Desus Nice and The Kid Mero disclosed that their Showtime show, "Desus & Mero," was ending. That news came just months after James Corden revealed that he'd be leaving "The Late Late Show" and about a year after Conan O'Brien decided to say goodbye to late-night after almost 30 years. If late-night television had a true golden age, we probably passed it sometime in the past decade. After a period of what looked like unchecked expansion, with new late-night shows popping up...