It has less to do with complexity and more go do with REPL/Jupyter notebook support. Rust is a compiled language and you won't get some of the ease of explorato

It has less to do with complexity and more go do with REPL/Jupyter notebook support. Rust is a compiled language and you won't get some of the ease of exploratory data analysis you do with something like ipython. I can use something like pandas or autograd to experiment with new optimization functions in seconds. For these big NN models it takes hours to days to wait for your model to train so squeezing out more performance is worth a more complex language.