>Why are we stuck with Python ...

I can only speak for myself, but I have been working in anakytics for a long time and I rarely use Python. Most of my analytical work is done in MATLAB, though I occasionally use machine learning shells or (matrix-capable) compiled BASIC. Since I write nearly all of my own code at the algorithm level, I can generate source code for any deployment system (SAS, SQL, Java, ...even Python!) with no need of libraries, etc.