Originally, predictive analytics was performed by hand, by statisticians on mainframe computers using a progression of various language such as FORTRAN. Some of these languages are still very much in use today. FORTRAN, for example, is still one of the fastest-performing languages around, and operates with very little memory. So, although it may no longer be as widespread in predictive model development as other languages, it certain can be used to implement models in a production environment.
Nowadays, there are many choices about which software to use, and many loyalists remain true to their chosen software. The reality is that for solving a specific type of predictive analytics problem, there exists a certain amount of overlap, and certainly the goal is the same. Once you get the hang of the methodologies used for predictive analytics in one software package, it should be fairly easy to translate your skills to another package.