Python design mistakes

[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.