By 'different domains', I don't think he was implying specialized financial applications as the only good domain for Haskell. Haskell is a very good general pu

By 'different domains', I don't think he was implying specialized financial applications as the only good domain for Haskell. Haskell is a very good general purpose programming language for the reasons the commenterd gave in the thread. It is great for all kinds of general backend tasks. The kind of tasks one would associate with Java would also be a great for for Haskell. Python is also general purpose. It's dynamic typing is especially good in specialized domains of rapid prototyping and exploratory data analysis (perhaps useful at investment banks too).