The San Francisco 49ers are undergoing a significant roster transformation in the 2025 offseason, leading some to mistakenly label it as a rebuild. However, NFL insider Albert Breer emphasizes it's more about roster churn rather than a complete teardown. Key signings include Brandon Aiyuk and Deommodore Lenoir to long-term contracts, alongside shorter deals for Jauan Jennings and Colton McKivitz. Despite losing several integral members of their 2023 Super Bowl squad, the core remains intact, featuring stars like Nick Bosa and Christian McCaffrey. The success of their future hinges on the performance of their recent draft classes, which must improve if they wish to remain competitive.