Eh, it's rare as a top 3 program, but it's not completely unique.
The school, independent of the coach or staff, brings a lot to the table as a college basketball program. The results of the current staff and team(s) must be judged against that standard and with an understanding of what the program itself has going for it. Those are things that enhance whatever a coach and staff bring to the job, it's not a job that largely works against you.
So if a coach can be successful over time at any of dozens of other schools, they should be able to find success at Carolina.