In Haskell List is a Monad as well as MonadPlus. Since List's Monad instance is used probably 100x more than its MonadPlus instance, I think it makes sense to f

In Haskell List is a Monad as well as MonadPlus. Since List's Monad instance is used probably 100x more than its MonadPlus instance, I think it makes sense to focus on that,