Without taking a side here (and declaring for the sake of openness that I use Julia regularly and it is very helpful for the scientific work I do), I think it is worth noting that this was from 2014 (the language has moved forward greatly since then) and the inappropriately negative response described seems to be from 1 developer and not representative of the team.

Edit: To add, Julia is now my go-to language for any scientific/numeric programming and would be my number 1 suggestion to anyone else doing similar work.