The question seems to be about the convenience of managing email addresses and passwords, which is more related to personal information management rather than project management. However, from a project management perspective, especially in the context of Professional in Project Management (PPM), it’s important to maintain separate credentials for different systems to ensure security and proper access control. Using a single email address for everything can be risky as it may lead to security breaches and make it difficult to manage permissions for different project aspects.

References: = The Professional in Project Management (PPM) materials emphasize the importance of security, risk management, and proper documentation, which includes maintaining secure and separate access to project information and systems1. The PMBOK Guide also discusses the importance of project information security and risk management, which would include practices around the management of credentials and access2.