It was perfect symmetry. After each of the ACC Coastal's seven teams won a division title over the course of seven years, Notre Dame joined a divisionless ACC for the 2020 season and made the conference championship in its only try. In a way, that's like eight champions in eight years for a seven-team division. (The Fighting Irish even followed Coastal customs by getting stomped by Clemson in the title game.)
Barring sudden and unexpected expansion, or the ditching of divisions altogether, we will actually see a repeat champion in the Coastal this year.