Well the thing is, we already have incredibly looking games that play great with 8gb of vram and some of them have some really high quality textures (Plague Tale - no RT for example, or TLOU @ High preset). So if a UE6 game only works at the low preset with an 8gb vram, shouldn't that mean that it will look as good or even better than Plague tale maxed out? I mean it should be. The problem is, it probably won't. It will need 16gb of vram and will look like a 2015 games (monster hunter is a good example). But I ask you, is that the point of getting more vram? Just so the games use more and more of it without actually looking better?
There is absolutely 0 reason for games to start looking worse and worse on 8gb vram gpus besides horribly optimized games. Btw, have you tried hogwarts recently? A megatuned 9800x 3d drops to below 50 fps average and 24 0.1% lows just running through a small vilage (hogsmeade)!!! Are we really hardware limited here? I think not, I think the software is absolute horsecrap.