Have you had experience using reactive programming approaches?

Yes, I have used reactive approaches in programming, for example, using the Reactor library in Java. Reactive programming allows processing asynchronous data streams, responding to events as they occur, which improves the scalability and responsiveness of applications.

An example of using Reactor to process a data stream:

Flux.just("A", "B", "C")
    .map(String::toLowerCase)
    .subscribe(System.out::println);

Here, a stream of three elements is created, each of which is transformed and output as it is processed.