Just curious, do you have direct experience with big companies using R, python, etc in production? My sense from working with people from those companies (and a few internships at those companies) is that you could use something like R, matlab, or scikit-learn on your own workstation with a tiny data sample to explore the data, but then do crunching by translating that program into some Java or C++ code (sometimes using specialist libraries) and running that in parallel, for production.

Do people actually just skip that step and just directly deploy their R? That seems really scary.