Even with the pathetic string of morons we have had since Holtz we managed to go 9-3 or 10-3 or better once within every five year period. Thus, "hope" is restored by that one "good" season and the cycle repeats itself.
The only difference between Kelly and the others -- that is now in doubt -- is he is good enough to not have a losing season. His floor is 6-6. All the others managed to do worse to trigger being fired.