&quot;Sometimes, a cigar is just a cigar.&quot;<p>Phones are increasingly powerful, prevalent, and for a lot of people, their primary computer.  Being able to use the same code, data, and test cases for every platform you want to train or run your model on is good from a software engineering perspective.  Don&#x27;t underestimate the challenges of software eng. when ML is involved -- see, for example, <a href="http:&#x2F;&#x2F;icml.cc&#x2F;2015&#x2F;invited&#x2F;LeonBottouICML2015.pdf" rel="nofollow">http:&#x2F;&#x2F;icml.cc&#x2F;2015&#x2F;invited&#x2F;LeonBottouICML2015.pdf</a>