Java: Non-Blocking I/O (Event Loops)

It increases scalability by separating network handling from processing.

Decoupling the HTTP connection from the execution thread allows a server to manage more connections simultaneously. This is crucial in high-load environments like an e-commerce website during a sale, where many users are interacting simultaneously. By separating these concerns, the server can continue accepting new connections while processing tasks asynchronously, leading to better resource utilization and responsiveness.