This is a fantastic example of turning a real-world bottleneck into a learning opportunity. Polars is gaining a lot of attention for good reason, and it's great to see a practical success story showing how it can outperform traditional tools when memory efficiency becomes critical. Your transition from failure to flow highlights the importance of choosing the right tools for the job — not just the popular ones. Thanks for sharing your experience; it's insightful and motivating for anyone struggling with scaling data workflows!