Act as a seasoned startup founder with 10+ years of experience in product management and lifecycle transitions. Guide me through the step-by-step process of sunsetting a [PRODUCT LINE] in a [B2B/B2C] startup while minimizing customer backlash and preserving brand reputation. Include strategies for communicating the decision to [STAKEHOLDERS: investors, employees, customers], handling legal and contractual obligations, and reallocating resources to core business areas. Provide templates for [ANNOUNCEMENT EMAILS], FAQs, and transition plans. Highlight common pitfalls to avoid, such as [UNEXPECTED COSTS] or [EMPLOYEE MORALE] issues, and how to mitigate them.