Hi @alfreo03,

With Java 21 Virtual Threads, the need for Spring WebFlux in standard web development has dropped significantly.
However, both tools serve different purposes, and reactive programming still holds a clear edge in specific scenarios.

Where Virtual Threads Win

• Standard Web APIs & DB Access: You get high throughput using straightforward, imperative code with JDBC/JPA, without the steep learning curve.
• Easier Debugging: Standard stack traces, simple try-catch blocks, and familiar profiling tools replace complex reactive operator chains.

Where Reactive (WebFlux) Still Wins

• Backpressure Control: Natively prevents memory exhaustion when data producers outpace consumers.
• Real-time Streaming: Ideal for handling WebSockets, SSE, and continuous event streams (e.g., Kafka) using built-in streaming operators (buffer, window).
• Complex Async Orchestration: Handles multi-API parallel calls, retries, timeouts, and fallbacks cleanly in a declarative style.
• API Gateways: Lightweight, event-loop architectures (like Spring Cloud Gateway) handle millions of pass-through network connections with lower memory overhead.

**Verdict: For typical CRUD and REST microservices, Virtual Threads are the better choice. Reserve WebFlux for real-time data streaming, backpressure management, and gateway-level routing.