"Nervous? Anxious? You found an irreproducable bug in your program and have to fix it until tomorrow? You feel that your code needs essential cleanup, but you postponed it for long in order to not introduce new bugs? You can hardly maintain the code as it grows and grows?
Pause a minute!
Maybe we can help. Try Haskell. Its effect is immediate and long-lasting. There are warrantedly no side effects. It's scientifically approved. Available without prescription."
I don't think it's so important to promote Haskell as to promote language diversity. In most environments, industrial or academic, people usually have to use one language because it's the standard language in the place. Once I had to use Fortran to write code just because teachers in that university believed Fortran is the best tool for numeric programming (and we can understand that, since they were never exposed to anything else). It would be nice if people understand that it's better to have one group using C++, other using Python and other using Haskell than a lot of people using the same language. Best, Maurício