I have seen this before, but I think the problem is the code, not the paradigm. If you bend your mind a little and think of stateless functions as a chain of (O

I have seen this before, but I think the problem is the code, not the paradigm. If you bend your mind a little and think of stateless functions as a chain of (OOP) method calls, function arguments as class instances and namespaces those functions as classes themselves, then there is little reason to think that it should be impossible to trace, given equal familiarity with the tooling.