Continuity is discussed every season as important for teams who make a deep run into the playoffs. Offensive lines who stick together, for instance, tend to outperform those that never find a rhythm. Losing starters or having a mid-season change at a key position like quarterback could derail an otherwise talented group.
The same can be said for teams across seasons. Keeping the front office and coaching staff in place, for instance, means there is a collective understanding of what a team is looking for in players and what kind of locker room or identity a team is building toward.