Danny Hope did not make it to year 5.
Darrell Hazell was canned in the middle of year 4.
With Jeff Brohm, Purdue has finally some continuity at the head coaching position, and there is a measure of job security since his contract alone dictates he is most likely around through 2022 (at minimum) unless he is framed for a crime or something. Still, this year needs to be a turning point.
The 2017 season was a blessed surprise. After four years of drudgery Purdue got a 7-win season with a bowl win out of nowhere.