"` The article discusses microservices architecture and how it can be implemented using functional programming principles, specifically with Apache Kafka and its Streams API. The authors argue that the synchronous model of microservices, which is commonly used, has limitations such as latency, inconsistencies, and complexity in handling failures. In contrast, a reactive, immutable, and functional style of microservices enabled by Kafka and its Streams API offers several advantages, including fast writes, consistent reads, and easier failure handling. The authors provide an example from a banking use-case at Capital One to illustrate how this approach can be applied. They also compare and contrast the FP-style with the OO-style of microservices in terms of data access patterns, orchestration patterns, handling failures, write-time and read-time latency, reasoning about state over time, and dealing with side-effects.