When it comes to work, niche languages lose their ground once you start digging deeper and attempt to venture slightly outside their focus domain. They do not have dedicated teams or industrial money and will always lag behind. Look at DL4J, they have a whole company working on it for many years.
Of course time will tell but considering the results so far I am not convinced that investing time into learning a new language will pay off. Especially considering Julia interop with C/C++.