Yes! Another thing I love about FP is the simplicity of terms. So like how you mention a return value can flow through different modules, if you wanted to do something like that in OO, you’d have to come up with a concept for what the new object is (ie, Service or what have you) which in turn has to take an object, breaking the whole “data and behaviour combined” idea. In FP, you just have modules. You don’t have think much past that a module is a group of functions that work on a certain data structure and other modules might also work on that data structure and that is fine (though of course you’ll want to hide those behind another module and delegate if you are dealing with a complex model, but that is a whole other problem that also exists in OO).