In the GPU market AMD is both lazy and stupid: they just try to undercut NVIDIA a bit, they should understand that they don't have a product as good as RTX and focus to provide decent low price GPUs with a lot of RAM in the 200-400$ range.
If someone has 500 to spend they could as well spend 650 and buy NVIDIA, those on a budget on the other hand would buy AMD if they had proposed a 12-16gb good rastering option on the cheap.