And C) it is taught at every University that teaches ML/DS. I think unseating Python as the lingua franca will takes as long as it has taken to unseat MATLAB i

And C) it is taught at every University that teaches ML/DS. I think unseating Python as the lingua franca will takes as long as it has taken to unseat MATLAB in engineering. 20+ years... Of course other things will also exist, and all languages will have decent ML support (especially for inference).