I surprised amd/nvidia havent started making specialized GPUs for mining to be honest.
I think these days they're selling more of them for mining and less for gaming.
it would be a moron move on their part.
The entire thing that make gpus' work is that they are multipurpose.
If they sell standard rx 570's , rx 580's , 1070's , 1080's ,1080 ti's like mad leave it alone do not fix what is not broken.