I did choose Common Lisp over Julia - I started learning Common Lisp in 2013 and Julia started becoming something around 2012.
I did so because of the permanence and the demonstrated expressiveness and power of Common Lisp. Common Lisp has been around for almost five times longer than Julia, and Common Lisp has demonstrated again and again that it is capable of solving hard, poorly understood, real world problems in a lot of domains.
Fun fact: Julia bootstraps off of an implementation of Lisp. Furthermore, most compiled languages are translated into an abstract syntax tree (AST) as part of compilation. Lisp S-expressions are a text based AST. So I can make the argument that Lisp is as close the "One True Programming Language" that we have. :-)
I'm doing chemistry - that's fundamental and timeless - I find it maps beautifully to a fundamental and timeless language like Lisp.