Unchecked exceptions are the worst of both worlds: you can call a function that will throw an exception that you could recover from but you have no idea, so you

Unchecked exceptions are the worst of both worlds: you can call a function that will throw an exception that you could recover from but you have no idea, so you don't even know you should catch it. At least, Either/Option force your code to take errors into account. You still have to bubble them up and compose them manually, though, which is why checked exceptions shine.