Indeed. No manager will stay forever, someday he must leave the team. When a new coach/manager comes, he must have some challenges. He needs to adapt with the players and the atmosphere of the competition. Sometimes it takes for more than 1 season to adapt well and manage the team in the right way. Choosing the right strategy/tactics must know the players first, it won't be easy and won't be in a short time. Even a coach is an experienced person, it won't be an instant process to adapt with a new team.
It's true, of course there will be no coach who will last forever. There will definitely be a time when a coach who has stopped will definitely leave. Of course, when a new coach comes, it requires adaptation, moreover, each coach definitely has their own tastes, so they have to be able to adapt themselves to their environment and get used to being able to blend in and that certainly doesn't take a short time, it definitely takes quite a long time to be able to adapt and find the best between each other, especially when a change of coach occurs there will definitely be changes, even if they are said to be small.
as has happened with several teams that have just recruited new coaches, I think they need time to adapt. Even though previously they had a good and strong performance, it is unlikely that the new coach will carry out what has happened, of course the new coach will make changes according to his wishes. I hope that all teams that recruit new coaches can adapt well so that they can find the best point in their team's performance and be ready to compete in the upcoming matches.