Ultimately Julia combines the strengths of both and much more. It is the future IMO, not R or python.
Selecting Julia blindly is just as stupid as selecting R or python blindly. Language features are only a small part of the reason you choose a language for a large project.
There are not enough libraries (I looked 3 months ago) for me to do my work in Julia.
There isn't enough users to make the libraries for my use case.