[vjerancrnjak]

I don't see how try-catch promotes single responsibility principle. I feel like this principle is just arbitrary.

If I have Result<Error, Value> and I change the Error, I have to change all places that are using the Error type and tweak the error handling in mapLeft or flatMapLeft.

If I instead raise Error and change it, I have to look at all the places where this error explodes and deal with it, not to mention, most languages won't even give me a compile time warning if I still keep the previous error type.

I agree that if language does not have do-notation, that it's a bit ugly to sprinkle map and flatMap everywhere. Good example of ugliness is https://github.com/repeale/fp-go

I think only an effect system, or a big environment object, places everything at 1 place, and when types change you have 1 place to edit the code. But starting immediately with an effect system (to abstract away control flow) or big env (to lift all ifs up) is premature.

[ATMLOTTOBEER]

Your complaint wrt sprinkling flatmap is the motivation behind scala for comprehensions