Can you give an example of a project maintained by a large group of people written with monads? The only one that comes to mind is Spark, and while I haven't u

Can you give an example of a project maintained by a large group of people written with monads? The only one that comes to mind is Spark, and while I haven't used it recently, was nightmarishly buggy with many subtle corner cases :/ Even jumping outside of C, Atom, Eclipse, Chrome, FireFox all are maintained by large groups of people and dont have a single monad!