Does anyone use this outside of college classes? It looks so great in these demos but I never hear of companies using it.
it has the nicest calculator syntax (imho) among the tools i've tried (python/julia/array langs/matlab/etc...) with extensive docs for each function and a nice notebook interface, but i've never written a program in it that was longer than one expression.
It used to be pretty popular for mathematical modeling in quantitative finance.
Not industry, but it's pretty popular among theoretical physics researchers.
I have used at work a lot for some projects (device physics modeling stuff)