R is a hybrid of a very slow language and statistical algorithms written in C that can't be debugged. Also the libraries don't have name spaces, not strongly typed, and there are many other features and libraries that show their age.
My favourite examples of Julia's great type system are its automatic differentation libraries that take a native function and wouldn't be possible with R.
My favourite examples of Julia's great type system are its automatic differentation libraries that take a native function and wouldn't be possible with R.