The article discusses the challenges of managing data in machine learning, including the proliferation of specialized tools that can lead to increased architectural complexity and data costs. It highlights the potential benefits of using a single database or data warehouse like ClickHouse as the central datastore for the machine learning data layer. The author explains how ClickHouse can simplify infrastructure and enhance developer efficiency by handling tasks such as data exploration, preparation, feature extraction, training and evaluation, inference, vector store management, and observability. By using a single system like ClickHouse, users can avoid the need for multiple specialized tools and reduce maintenance costs, architectural complexity, and data duplication expenses.