I have to be honest - I fondly remember watching him in college with my girlfriends, where he was the cool new kid on the block compared to Johnny Carson, but I hadn’t watched him in years. Most of the buzz in the last 10 years has been about Conan O’Brien, Jimmy Kimmel and of course Stewart / Colbert (who competed in a slightly different space). I wouldn’t have known til recently whether Letterman was still on or not.