The document discusses why actor-based systems are well-suited for microservices architectures. Actor models use message passing for communication between loosely coupled components, avoiding tight coupling issues of HTTP/RPC APIs. Message queues provide lightweight pub/sub messaging that is scalable, available, and promotes eventual consistency over tight synchronization. Actors represent message-driven processes that handle incoming messages asynchronously, supporting natural distributed and concurrent processing. Their built-in failure handling, routing, and back-pressure capabilities make actors a simple and high-level abstraction well-aligned with distributed, message-driven microservices.