We see this all the time right, the next big ML company is going to come from some scrappy startup with a precise focus on what to do (either because they're geniuses or because they're just the lucky idiot amongst 10,000 ML startups), not from some behemoth that decides "we'll eat that for breakfast". Swift4ML suffers from the fact that Swift exists. To make S4ML work you need to abandon atleast some of the things that makes Swift Swift.