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Hey you. I'm pretty sure I know who you are :) I hope everything's going well!

I definitely agree that there are many examples of ineffective Haskell culture. As a Haskell contractor I get to see how a lot of different shops do things. One thing I can't really tease apart is that most startups have a lot of engineering culture problems, and picking Haskell doesn't inoculate you from that effect.

The main cultural issue I see specific to Haskell shops is that frequently rabbit holes aren't discouraged. By that, I mean there is too much of a tinkerer mentality where engineers are allowed to or even encouraged to experiment with untested ideas instead of known effective solutions. That is a habit I had to deprogram myself from too. It's very fun! In your spare time.

I hope we get to work together again! But I'm usually only called in if there's trouble, so maybe I shouldn't :^)

This is pretty sound advice for any language. You always want most of your code to be dumb. You save high abstraction for things that have a sensible interface and are common enough to need DRYing. Haskell has a higher abstraction ceiling than most languages and there is less trodden ground, so there may be more opportunity to get lost down the rabbit hole. However Haskell2010 is a beautifully simple language that can solve all your problems (maybe with a bit more code than enabling 20 extensions will afford you).

I had a similar experience with a different language at a startup where one programmer particularly would produce the most horrid code, use new features and libraries where they weren't needed, generally overcomplicate everything. He was smart as hell and made that smartness a liability for everyone else. The bottom line in a business is the bottom line; making money. He didn't understand that at all. No level of abstraction was too high, even trivial stuff. Dumb code that did the job well... dream on.

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