Issue is not everybody knows about the 8GB vs 16GB VRAM performance difference. Combine that with how much worse 8GB variant performs on older PCIe versions its a double whammy. Those who buy it for their old systems thinking it will be a nice upgrade are in for a nice "treat" instead.
I wish 16GB PCIe 5.0 x16 benchmark was included in the video as well just so I compare if there's even a little bit of difference between it and the earlier versions.