You are leading the sunsetting process for [FEATURE_NAME], a legacy feature in [PRODUCT_NAME]. Outline a step-by-step plan to ensure a smooth transition for users, minimize disruption, and maintain trust. Include: 1) How to assess the impact on [USER_SEGMENT], 2) Communication strategies for stakeholders (internal and external), and 3) A timeline for deprecation, including key milestones like [NOTIFICATION_DATE], [LAST_ACCESS_DATE], and [FULL_SHUTDOWN_DATE]. Provide templates for user notifications and internal documentation. Highlight risks like [POTENTIAL_BACKLASH] and mitigation tactics.