[pron]

BTW, the guy you replied to is part of the team working on what is probably the most advanced compiler technology breakthrough in the last decade (Truffle/Graal). So he's not "technically right", but has actually contributed to the world's most revolutionary compiler (which is written neither in Haskell nor a Lisp).

[reitzensteinm]

I was replying to what he said, not who he is.

[pron]

I think that's relevant context which proves that your analogy in this particular case is inappropriate. He's a chef working in one of the world's greatest restaurants and he's not using a machete to open the coconut. Therefore, there are probably good reasons to prefer another tool and the advantages of a machete are probably not that big (or are offset by other factors). Again -- in this particular case.

So while the "any Turing complete language" is an over-generalization, so is "use the right tool for the job". Programming languages are not at all like knives or hammers as they are 1/ terribly expensive 2/ require constant training 3/ require specialization and 4/ each designed to be general-purpose. It's more productive to use just one language you know best than keep switching to a completely different one that's marginally better at the particular task at hand.