I'm not sure how useful monads are in any context where a language doesn't provide syntactical sugar for the usage

The practical benefits of a monad are not distinguishable from this chaining from the point of view of someone using a library (unless you exposed the bind/return function to the user)

It can allow some elegant code reuse for implementers I suppose

But it's such a complicated concept for something that it is ultimately a tertiary tenet of functional programming

On the other hand I do like them because they are Cool and Interesting