Your post makes no logical sense because your redundant statements about VRAM helping DLSS or RT performance have nothing to do with a card running out of VRAM.
Which makes your comment about RTX IO helping with VRAM in current generation games even more silly than it initially was.
The original post I replied to was tying GPU power to the amount of VRAM. Both Ampere and RDNA2 are already lacking GPU power. Adding more VRAM to Ampere wouldn't increase the GPU power.
DLSS upscales an image thus requiring less VRAM. RT Performance is a good indicator of GPU grunt. We don't know how RTX IO will help with reducing VRAM usage, but it will reduce the minimum amount of VRAM requried.
I own a 3080 and I'm not running out of VRAM.