In hindsight, I wonder if using Swift would seem like a good idea in retrospect. AFAIK NVIDIA has dropped CUDA support on Mac, and outside Mac and a bit of Linux; how much support does Swift have?
Even though the article talks about the "why not Julia", which is the highest comment at time of typing ... Choosing a cross-compatible language would have kept more people interested in the long-run. Why should I as a Windows user want to learn a language just to use it with Tensorflow; when I'm not sure if such language support and other tooling will generally come to Windows?