Your model isn't wrong—it's just looking at stale data. Here's what happens in most ML teams: you compute features in a batch job for training, then cobble together a completely different system to serve them at inference time. The two drift apart. Your model silently degrades. Nobody knows why until a customer complains. The fix isn't a better model. It's a better #Database. 🔹Use Amazon DynamoDB as a single-digit millisecond feature store that keeps training & inference in sync 🔹Walk through schema design for feature groups, versioning, & point-in-time lookups 🔹Build a metadata layer that tracks exactly which features, datasets, & hyperparameters went into every #MachineLearning model version If you've ever shipped a model that worked in dev & slowly broke in production, this episode of Databases for #AI shows you where the real problem was hiding.