The MEAN stack, which includes MongoDB, Express.js, Angular.js, and Node.js, has served as a widely adopted pattern for web development. However, its components have failed to keep up with the times, leading to scalability issues and limitations in handling modern web applications. The JAM stack, which includes JavaScript, APIs, and Markup, is an updated approach that focuses on the thick-client browser environment and marginalizes the backend. In contrast, a modern system prioritizes cloud-native scale, utility billing, infinite scalability, low latency, user-relevance using machine learning, and storing and processing disparate data types and sources. SingleStore, a NewSQL database, has emerged as a solution that meets ACID guarantees, provides durability, supports SQL, and delivers boundless scale in the cloud. The author argues that SingleStore is the modern stack's database of choice for crafting modern app stacks.