It is hard to argue that Chelsea's model for chopping and changing managers under Roman Abramovic was not a hugely successful strategy.
Thomas Tuchel did in 2021 what Roberto di Matteo had managed nine years earlier and won the Champions League after only taking over in the middle of a campaign. The fact that Chelsea reached two cup finals last season also suggests that they are one of the best teams in the country on their day and well capable of winning silverware.
However, it does not appear a coincidence that the Premier League title has not presided at Stamford Bridge for six years and counting. The planning at the Etihad and Anfield has been so good for so long that they have become immune to the instant impact of a managerial change elsewhere.