Why the focus on monads? There are many other types that model effects, like arrows. Erik Meijer of course knows what he's talking about, but whenever I see so

Why the focus on monads? There are many other types that model effects, like arrows. Erik Meijer of course knows what he's talking about, but whenever I see someone talking at length about the benefits of monads I can't help but feel they're spouting a lot of nonsense about the currently fashionable buzzword. I think the wrong thing to do would be to convince users of other languages to stop and say "should we be using monads here?" Monads are irrelevant, it's just about being explicit with effects, so I wish the focus wasn't on monads.