PyTorch 1.0 is out
What surprised me most is the elegance of C++ API. Compared to its equivalence in Python, the C++ version is almost the same if we discard the "auto" keyword [0]. As mentioned in the doc, they put user-friendliness over micro-optimizations, which also proves the expressiveness of modern C++ (at least when they want to prioritize user-friendliness!)
[0]: https://pytorch.org/cppdocs/frontend.html#end-to-end-example