[r2dnb]

Many thanks jorgeleo ! I wasn't clear on how FP handles complexity management and the unknown. You've beautifully connected the dots and helped me shift my thinking, this is all clear now.

In particular your demonstration was very convincing from a DDD perspective. I can see that FP is not less natural than OOP for domain modelling while it approaches things from a very different angle. However FP brings to the table rich domain semantics, high correctness guarantees, and I feel productivity gains too. And with the mindset you've presented, it is also clear that the unknown seems to be accounted for in FP too. As an architect, this last point was the grey area and the deal breaker for me. However now I see no reason not to invest in heavily leveraging FP moving forward. Thanks again jorgeleo.