Colbert

Colbert's show was cancelled primarily due to economics. The show was losing CBS $40M A YEAR. A bloated payroll of over 100 writers? Whether is was funny or not doesn't really matter here. If people are turning off, you don't get to keep your job.

The good ol days of folks watching their prime time shows, then their local news, followed by Johnny Carson are GONE. Peoples tastes have changed and their viewing options are unlimited.