[boothead]

You might not be productive in the traditional sense of "delivering business value". However over the years of letting Haskell change my brain a little piece at a time, the results have accumulated. I wouldn't swap that deeper understanding for all the productivity in the world. :-)

[glutamate]

Haskell is a great language for delivering business value. The typed FP paradigm encourages reusable code much more than any other paradigm I have tried.

[boothead]

Yes, absolutely agree with you. I wish I was writing Haskell day to day.

My point was that it takes a long trivial amount of time to learn Haskell during which you might feel "unproductive" by that measure. I feel that it's during that period that the magic happens :-)