You're a PM at Google. How would you sunset Gmail?

Focus on the strategic considerations of phasing out a major product like Gmail. Begin by analyzing the user base and the potential impact on users, including communication needs and data migration. Discuss how to communicate the decision to users and stakeholders, ensuring transparency and minimizing disruption. Consider alternative solutions or products that could replace Gmail's functionality and how to support users during the transition. Finally, outline metrics to measure the success of the sunsetting process and ensure a smooth transition for all users.