From development to acquisition
The traditional model assumed a player arrived, learned and improved across several seasons. Widespread movement shifts the emphasis towards acquiring players who are already capable of contributing immediately. That changes what a coaching staff is for: less long-arc development, more rapid integration.
Rebuilds got faster
A programme that once needed three years to become competitive can now change its outlook in one offseason by adding experienced players. The flipside is that decline can be equally abrupt, since a good season can be followed by the departure of its main contributors.
Why stability is now valuable
In an environment where most teams are partially rebuilt each year, a group that stays together gains an unusual edge in familiarity. Continuity used to be normal and is now a strategy, which is one of the quieter consequences of the change.