Do people not get what, exactly? Because so far, all the "I NEED MUHMEMORY" afficianados cannot point to a single set of benchmarks showing memory bottlenecking on the nvidia 3000 series. Its pretty easy to show, frame time varience would be attrocious and stutter could be measured even by a rank amateur. People post pictures of VRAM usage from afterburner and go "SEESEESEEPROOFIWIN" seemingly unable, or unwilling, to understand that VRAM allocaion =! VRAM usage.
Pumping up a cards price by $100+ just for some pointless memory is seen as wasteful by many.
A quick list of the current facts
1. There is no memory bottlenecking as of right now with 3000 series cards (at least in regards to VRAM size)
2. Video card memory sizes on the Nvidia side have remained stagnant for 2 generations
3. There are multiple video games that exceed 8GB of VRAM usage currently.
4. since the windows 2017 creator update, WIndows 10 task manager shows VRAM used, not just allocated. MSI afterburner has the capability as well.
5. AMD is offering competing products at lower prices (MSRP of course) that include more VRAM.
6. There is historical evidence that in a situation like the 3070 8GB finds itself in, memory issues 2-3 years down the line are likely. The 1060 3GB is a great example of this. Zero issues at launch but some games at the time did use more than 3GB. Memory usage increased year over year until eventually the memory was over-provisioned enough to the point where you get the characteristic memory stuttering and terrible frame pacing. VRAM issues don't arise from exceeding the VRAM installed on the card but instead over-provisioning the VRAM to the point where critical game data is being swapped between the main system memory and VRAM because the GPU doesn't even have space for the high priority data in the VRAM anymore. Modern video cards are pretty good at keeping high frequency access data where it's most needed which is why you don't start seeing serious issues with VRAM until you are quite a bit over your actual amount but it does get to a point where the video card can't even store data it needs from frame to frame, which causing the trademark stuttering issues. I'd also like to add to this that 16GB has also been the standard for gaming PCs for a long time and as such this could equally erode the buffer that gamers with something like a 3070 have. If your video card is overprovisioned and you don't have enough main system memory either, that means you are going to be relying on virtual memory. Now I can tell you with a 1080 Ti and 32GB of RAM I'm seeing 12GB of RAM usage and 8GB of VRAM usage in CP2077. 8GB is fine now but 4GB of RAM is not much of a buffer. Heck I'm not even running anything in the background, no steam discord nothing.
For people who want a video card that lasts, wanting more VRAM is certainly something they should want as I've demonstrated above.