Certainly, I couldn't have done what I did without Haskell, or with more traditional languages, like C++.

The most challenging task I've done with Haskell, was to find the right combination of parameters in orden to sum an array of satellital images, preserving a set of constrains. I couldn't have dreamed of doing that without Haskell. It was the right choice for the job.

When they discovered the tools I've used, they recognized the problem, but they treated me bad, so I search for another job.

The right tool for the job is one that will be supported by other developers after you leave.

The right tool for the job is anything that gives you the power to get shit done.

Maintainability is secondary if you can't do the job in the first place. Think about it.

I think that using Haskell in the industry is somewhat irresponsible if you live in a third world nation like Chile. You can't find haskell hackers here! You create maintainability problems!

It is clearly not my fault to be intelligent, know some haskell and live in Chile. Can you blame me?

That doesn't sound like a very good way to build a sustainable business.

Conversely a technology that is beneficial solely to the business presents the same situation. Your own productivity and motivation will be affected by the chosen technology, so working with something you hate with a passion isn't going to be that good for the business either.

I think his ability with English maybe giving the impression he was being flippant. If you remove implied meaning, it says only that "I know it was bad for the company, but I found it fun".

My point still stands.