This is all fine, but the problem is not at all in the speed of VRAM, it is sufficient, the problem is in the speed of the system RAM on x86 - it is shameful and insufficient by more than 3 times at least, but rather by 5 times. The loss of balance between SystemRAM and VRAM solutions has long been obvious to any IT expert. Apple M2 Max memory controller is 5 times faster than the fastest x86 consumer solutions. And this is shameful for Intel/AMD.
Shameful RAM on Intel/AMD(which is even worse) is 10 times slower than VRAM. Its performance is not enough even to comfortably service 2-3 pci-e 5.0 SSDs, not to mention something more.
It's like running water into a 100m swimming pool through your bathroom faucet. Long and slow...