With the introduction of virtual threads in Java 21, it seems that reactive programming became irrelevant. After all, from now on we don't have to sacrifice the readability of our code for its scalability. Does this mean that frameworks like Reactor are definitely gone? Well, no - there are still places where their use can bring direct benefits. What's more - thanks to virtual threads, you can use these libraries in a way that until recently would have been considered a serious error, but now it certainly has its justification. I invite you to a fascinating journey into the land of reactivity in the new version!