I am intrigued by the conflicting ideas of how long we expect a manager should stay. In years past a it was assumed a manager would retain his job until he failed or was made a better offer. This model of management seems to be changing especially on the continent . Guardiola very successful at Barcelona still moved on to Bayern and is now at City , why ? I believe the arrival of the DoF role has changed things. Clubs have decided it is better to have an overarching system in place to establish consistency and continuity. This in time relegates the importance of the manager/coach to an easily replaceable part of a larger system.
In this system regularly changing coaches prevents stagnation(think
Moyes), or expensive mistakes(think Martinez), since whoever is in charge the clubs playing system,player acquisitions, continues on a pre determined pathway.
