I don't agree that having great success leads to a "cliff" . After three terrific seasons , Dombrowski got a little complacent and let the bullpen deteriorate. Then came injuries and underperformance of key starting pitchers . A predictable ( to me ) poor season was the result. Apparently, that was reason to fire Dombrowski and to trade away our best player. It is hard to evaluate the disaster that was 2020, as that was an extremely bizarre season. This season , the Sox got back on the right track. There was no "cliff" . There was no " boom and bust " . That was always nonsense. And , " sustainable " is just another trendy buzzword. Continual success requires work and diligence every year.