Actually I don&#x27;t know Haskell beyond the most basic examples. I singled it out because it was one of the cases where &quot;Promises 10x productivity&quot; may be, well, the least outlandish. But it does come at the cost of &quot;change of paradigm&quot;.<p>For me C# is at least twice as productive as Objective-C, so I suspect there more where that came from. I&#x27;m on the lookout for another 2x boost. But the farther down that road you go, the more isolated you become. It&#x27;s a bit of a balancing act between individual productivity and being able to hire and work in groups, or to find help. Perhaps