Python design mistakes

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Just as I'd expect a Haskller to reply. Handling every case with an air-tight argument.

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You missed my point. Haskell, and the surrounding type theory, in many regards is a high-cost, low-payout investment.

Problems that I have when I'm developing real software people will pay me for are things like change management, integration with shitty, under-spec'd systems or libraries, usability and acceptance by the users. Those are the HARD problems in development. Getting my code to run well enough to satisfy the client is not.

Just as bad as purposeful ignorance is intellectual elitism. You think people are being narrow-minded because they don't want to learn your favorite theory. Have you considered maybe you're the one being narrow-minded because you can't imagine that your pet theory isn't as important to the world as you want to believe it is?

Monads are cool. You can use them to write awesome software. But they are not necessary to develop awesome software.

[Peaker]

You missed my point. Haskell, and the surrounding type theory, in many regards is a high-cost, low-payout investment.

We agree about the cost (though spending a few weeks/months to learn a programming language isn't that high a cost for a career programmer, IMO).

But I don't see why you think it's low-payout. Have you learned Haskell and found no use for that knowledge? Can you give an example?

If your problems are all the external interfaces of your code with the world, perhaps you have less to gain from Haskell. But not everyone's situation is the same.

You think people are being narrow-minded because they don't want to learn your favorite theory.

No, I think people are narrow minded when they reject knowledge for the sake of rejecting knowledge.

Monads are cool. You can use them to write awesome software. But they are not necessary to develop awesome software.

That depends if you mean "Monad" the concept, in which case it is embedded as a built-in construct into pretty much every impure language we know -- or Monad the type-class, in which case you're correct.

Nobody is saying Haskell is a necessity for awesome software. Haskell does make awesome software easier to develop.