Julia is really fun to use, and I think they are onto something with the type system: Complex types interact much better across module boundaries than in most other languages; here's a good talk on this by one of the creators:
The biggest drawback of the language in my view is that Julia is an LLVM toolchain "pretending" to be an interpreted language (it is, technically), this often leaks as very slow first execution latency (and almost forces you to keep the interpreter open instead of just calling it on the file you're editing).
https://www.youtube.com/watch?v=kc9HwsxE1OY
The biggest drawback of the language in my view is that Julia is an LLVM toolchain "pretending" to be an interpreted language (it is, technically), this often leaks as very slow first execution latency (and almost forces you to keep the interpreter open instead of just calling it on the file you're editing).