Mathematica is not tied to the notebook interface. The notebook is the most interactive way to use it, but you can save code in standard files and run it throug

Mathematica is not tied to the notebook interface. The notebook is the most interactive way to use it, but you can save code in standard files and run it through the engine. You had always the option to call this code from C, but now they are adding Python bindings too. So, in my opinion, the only thing that limits Mathematica to be used for web services is licensing. I think they know this and probably it is the reason why they don't spend too much effort trying to sell this use case.