If your data warehouse feels slow, expensive, or hard to scale, you are not alone. Many teams are hitting the same wall. Reports take too long. Storage costs keep going up. And when the machine learning team asks for raw data, the answer is always "we don't have that here." The good news? There is a clear path forward. It is called the data lakehouse , and thousands of companies have already made the switch. This guide will walk you through exactly what a lakehouse is, why it matters, and how to move from your old warehouse to a modern setup without breaking everything along the way. What Is a Traditional Data Warehouse? A traditional data warehouse is a structured database that holds cleaned, organized data for reporting and analytics. Tools like Teradata, Netezza, and on-premises SQL servers fall into this group.…