Are virtual threads making reactive programming obsolete?

Java 21 introduces virtual threads and structured concurrency, enhancing scalability and performance by simplifying concurrent programming. Virtual threads minimize the complexity of reactive programming, making the asynchronous programming model easier and more efficient. Structured concurrency groups related tasks for improved error handling and observability. Scoped values offer a better alternative to ThreadLocal variables by being immutable and optimized for performance. These features collectively promise higher throughput and more maintainable code.