Coaching changes are always among the most important stories late in a college football season.
Some programs need to replace a head coach who accepts a promotion—whether elsewhere in college or the NFL—or a longtime boss who retires. And of course, many schools are looking for a new team leader after someone else's unsuccessful stint.
Following the 2018 season, 27 teams underwent a coaching change. No situation is similar, and context is essential for each one. Realistic timelines for improvement vary dramatically, but two seasons—even considering the bizarre circumstances of 2020—is enough of a sample for an assessment.