The text discusses the limitations and challenges faced by data virtualization when used in isolation, particularly with caching. Caching can improve performance but has its own set of issues, such as TTL logic problems, inadequacy for large data sets, and lack of comprehensive data management capabilities. To overcome these challenges, a more comprehensive solution is needed, which integrates data virtualization with replication methodologies like ETL, ELT, and CDC. This approach enables precise control over the load on source systems, advanced performance and scalability, facilitated storage and transformation capabilities, and direct harmonization of master data. A flexible data integration platform that supports different styles can help organizations capitalize on the strengths of these diverse approaches and work efficiently in today's rapidly evolving business environment.