Dive into a 17-minute conference talk from Devoxx Greece 2024 that explores the journey of transitioning from a legacy Business Intelligence (BI) platform to a modern data stack. Learn about the challenges and benefits of moving away from custom API integrations and script-heavy SQL towards adopting contemporary data ingestion tools, dbt for documented transformations, and Airflow for orchestration. Gain valuable insights into the migration process, understand the advantages of a modernized data infrastructure, and discover the obstacles encountered and lessons learned while navigating potential pitfalls. This talk by Georgios Ntanakas offers practical knowledge for data professionals looking to upgrade their BI systems and streamline their data management processes.