I've been using C++ and Python since the early 2000s. Julia these days is my go to free time language to hack together stuff in, partially because I've been impressed with what comes out of that ecosystem despite the smaller community. I think this is at least a testament with how composable things are relative to C++ or python.
I love many things about Julia, but there are definitely growing pains for the language and I can see why it may be a hard sale to people used to modern python or C++, both of which have improved since Julia came out. However, Julia has it's own goals that might make certain communities veer towards it. It'll be interesting to see if it gets more adoption in industry.
