Every few months We have an info that GPU mining will die. I heard it since first ASIC came to market. But, GPU mining is here, and will be here in the future. Maybe, with some new algos, new coins... and new GPUs...
Let's try to look it from another side. What is the profitable life time of one brand new ASIC? Not more than 8 months, and You will never know would You make return of Your investment. If You bought RX470/480 in August 2016, it is still profitable.