Tensorflow is the most used framework in production more importantly it's not really about specializing in a framework but more about understanding the underlyi

Tensorflow is the most used framework in production more importantly it's not really about specializing in a framework but more about understanding the underlying concepts of deep learning but to answer your question PyTorch is better from a research toying point of view Caffe2 will definitely get traction in the future. But more importantly "trends come and go but my foundations still eternal".