This paper provides a detailed examination of the challenges, gaps, and problems that institutions may face in moving to the DSpace 7 platform from previous versions or from different and various platforms such as EPrints, Invenio, etc., and the implementation solutions already successfully rolled out in such instances. Through the use of live examples, the presentation aims to illustrate the complexities and nuances of migrating repositories to DSpace 7. 4Science has developed standard procedures that identify pitfalls and decision points and related best practices that will be shared with the audience to help define a better and more informed planning of this often critical phase. The transition and evolution to DSpace 7 represents a great opportunity to rethink the repository structure and provide new services to users. Even for institutions coming from previous versions, this evolution is much more than an upgrade; it is essentially a transition to a new platform. From this point of view, the challenges and opportunities go beyond the technical ones. By sharing the experience gained from dozens of migrations to DSpace 7, we hope to help other institutions facing this challenge to make the process as smooth and successful as possible.