The information collected from the surveys at the end of a canceled project should be archived with project artifacts for future projects. This aligns with the best practices of project management, where lessons learned are documented and stored as part of the organizational process assets. These assets can then be used by future projects to avoid past mistakes and leverage successful strategies. The PMBOK Guide emphasizes the importance of capturing, documenting, and archiving lessons learned as part of the project closing process, even if a project is canceled. This ensures that the knowledge gained is not lost and can contribute to the continuous improvement of project management practices within the organization.
References: (PMBOKGuide - Sixth Edition and the Project Management Institute)