"The learning curve of those languages is not bigger then the learning curve of other languages."
If only it wasn't for the fact that reality and history has proven otherwise...
If only it wasn't for the fact that reality and history has proven otherwise...
Most programmers went form basic (lack of alternative) to C then C++ and now Java thats a path of simularity. Most where never exposed to functional programming and now the all have a hard time to switching there OO brain off.
The only proof we have of something being easier to learn, beside anecdotal evidence ("oh, I tried it and it was easy") is statistical empirical evidence, i.e people actually learning it. Well, people are not actually learning those languages. They are learning the "other ones".
(Where by people, I mean: a significant percentage of people, > 1%. I'm sure me, you and that "professional programmer who gives a shit about Haskell" do not a significant percentage make).
Even in universities, students find functional languages difficult, and opt-out of those classes.