I'm doing the same thing right now to get better at ML, and I chose Python. I partially disagree with you on longevity since not much math-heavy code would hav

I'm doing the same thing right now to get better at ML, and I chose Python. I partially disagree with you on longevity since not much math-heavy code would have been hit by the breaking changes in Python 3. In the ML domain I also disagree with your take on performance since there are plenty good enough GPU accelerated libraries for Python. Python also has the advantage of knowledge reuse in gainful employment since it's the preferred language for ML.