Same here. Was an early GMail for Domains user with my entire extended family (10 users). Have had problems with many features not working because "Workspace" (for example, adding a user to Google Home devices). Only did GMail for Domains for the custom address, would just be on GMail otherwise. Hate that there has never been a migration path, and will lose 13+ years of app purchases, pictures, email, youtube history, etc. without a migration tool.