After a decade of Scala and Rust I no longer believe in monads and prefer the way Go does error handling.
for a <- a()
b <- b() {
return a + b
}
looks nice but only by hiding error handling. Today I like looking at code and see the error handling. With monads you end up with monad stacks and transformers which introduce their own failure states.
I haven't played with Scala in a while, but Rust's error-handling is not syntactically monadic. If you look at the code, you don't see combinators, you see either error propagation or error handling.
