Ironically, I think you completely missed his point, probably because of an unfamiliarity with his background and history. He's not dismissive of reactive programming at all, quite the opposite! For example, he gave a course on Coursera about Functional Reactive Programming with Martin Odersky and Thomas Kuhn[0].
So my take on it is that he's just making fun of himself and his friends in a typical blunt Dutch fashion. Which of course doesn't work if you don't know the context.