When learning F#, at some point you'll come across the concept of Railway Oriented Programming (ROP). It's primarily a technique used for error handling and helps alleviate some of the struggles of using only exceptions. The main advantage is that possible error cases are encoded in the type system, which requires you to explicitly handle the possible errors instead of encountering an unexpected exception at runtime. Scott Wlaschin has a great post introducing the concept and use cases of ROP. This is a great read if you're unfamiliar with this style of programming.