Many enterprises are, indeed, using SPA and Node...for the client-facing, non-mission-critical web UI software. These applications tend not to be very large, and on this scale, these tools are usable. But once you get to the really heavy stuff that enterprises rest their critical core business on, they&#x27;ll stick with <i>real</i> languages like Java, C#, Python, C++ and Scala...things that they trust without question.