In May 2020, we launched new Google Groups to provide a modern experience that matches Gmail and other Google services. In September, we made new Groups the default experience for all users, but allowed individual users to choose to use the classic Groups interface. 

Starting on November 2, 2020 for Rapid Release domains and on November 9, 2020 for Scheduled Release domains, classic Groups will be turned off completely. After that date, there will be no option to use the old version (previously at Settings > Return to classic Google Groups). Users within your organization who were already using new Groups will not notice a change, but users who had chosen to use old Groups will be moved to the new interface. 

• Admins: New groups will be the only experience available to all users. To prepare for this change, you can visit our Help Center to learn more about the new Groups release, and note the features from old Groups that will no longer be supported in new Groups. 
• End users: Visit the Help Center to learn more about new Groups. 

• Rapid Release domains: Full rollout (1–3 days for feature visibility) starting on November 2, 2020 
• Scheduled Release domains: Full rollout (1–3 days for feature visibility) starting on November 9, 2020 

• Applicable to Essentials, Business Starter, Business Standard, Business Plus, Enterprise Essentials, Enterprise Standard, Enterprise Plus, Education, Enterprise for Education, and Nonprofits, and users with personal accounts. 

• Workspace Updates Blog: New Google Groups becoming the default for all users on September 15, 2020 
• Workspace Admin Help: About the new Groups release 
• Google Groups Help: What’s new in Groups