What are the main differences between event-driven architecture and other popular architectural approaches?

Event-driven architecture is based on processing events generated by the system or users, and reacting to these events. The main differences from other architectural approaches:

• Asynchrony: In event-driven architecture, components interact through events, allowing them to operate independently and asynchronously, unlike, for example, monolithic architecture with synchronous calls.
• Loose coupling: Components do not know about each other directly; they react to events, which increases flexibility and scalability.
• Reactivity: The system responds to changes and events in real-time, which is well-suited for systems with high data dynamics.
• Example: In traditional client-server architecture, the client makes a request and waits for a response (synchronously), whereas in event-driven systems, an event can be sent, and the system continues working; the event will be processed later.

Thus, event-driven architecture is better suited for distributed, scalable, and reactive systems where flexibility and asynchrony are important.