8GB worth of vRAM textures is low quality
Well if you want to load 8 gig of textures you will need a bigger capacity, there is other things that go in VRAM as well.
Bear in mind there is a big difference between loading 8 gigs of VRAM in say a small room, vs an open world area. If you doing streaming you also need spare capacity to load in new textures for areas coming up vs, on loading screens, you can flush it all and load in the empty area. Because consoles use video memory for loading normal data as well (some call it unified memory), we will see this practice more and more on PC ports, as was the case in far cry, and is the case in FF7 remake. This is even before RTX IO gets rolled out.
It is funny whenever someone mentions scenarios that may need more VRAM, some seem offended by it almost.