I know from reliable Sources that the fact that the games makes you think you Need so much VRAM, when in fact it does very well, even on lower VRAM Cards, is an "optimization" made by NVIDIA just so that their 11GB 1080ti looks better, when you get to see the game uses 9 GB of VRAM, more than the 8 GB competition.
In actuality, the game does very well on 8GB, and even on 4GB, even if it tries to load as many textures as possible.
Nvidia actually tried to make the game stutter if less VRAM is available than what the game might pull in total in VRAM, so that it may Claim that their 1080Ti is the best Card for the Job, when one wishes to Play using ULTRA Textures. That is why their are offering the game with the purschade of a 1080Ti. However, they didnt manage that due to the way the engine was build, and actually doing it would have required an extensive rewrite of the game engine, which in the end, didnt happen.
This is how NVIDIA "works with Producers" to "optimize" the game for their Cards. Welcome to "the way ist meant to be played" !
Ist the same way, new Drivers nerf the Performance of old Card, when actually the old Cards would havee suffice for that much longer, only so that you may buy their newer Cards.
Hell, if i were NVIDIA, i would have done the same Thing to increase salles. Consumers be damned, ist all about the Money, the Investors Need to be pleased, cause they payed for it, the actual People who use the Cards, are just dumb shit, overpaying for stuff that otta be seld for at most half as much.