[SomeCallMeTim]

What kind of code do you write? I write games (and, recently, UI-heavy interactive apps that talk to servers).

Even the most strident FP advocates I know who are real game developers say that they wouldn't even consider using a strictly functional language for game development. IO-heavy apps in general seem like they're not a good use of functional languages.

Different programming paradigms suit different problem domains. It's not complicated interactions that would make it harder to understand for a human; it's that when you try to use a language for something that it isn't well suited for, it can be hard to figure out what the program does or how it works.

The objective isn't to write the most clever code, or even the code that's easiest to reason about, but the code that works and is easy to understand.