Countless morning shows in Chicago radio have crashed and burned. Some took longer than others.

Bob & Tom Show>>>WRCX-FM Rock 103-5
Rover's Morning Glory Show>>>WCKG-FM 105.9
Howard Stern>>>WCKG-FM 105.9...In the case of Howard, his main competitor was Mancow on Rock 103-5. Howard Stern eventually left FM and continued his show on satellite radio.

I have furnished a link so readers can take a look at the ratings between the two. In nearly all ratings surveys, Mancow was the winner. If you scroll down the page, you will see the ratings.

I'm sure there are many other failed morning shows. The experts on this board will likely fill in the blanks.