The irony is that GN's test shows that pouring all the 12V into 2 pins is still enough not to run into the issue as long as the pins are properly seated. So they could have stuck with 3x 8pin older style PCIe connectors with ZERO issue.
nv couldnt stick with 3x 8pin because they couldnt fit them on the pcb with how much space the through fan cutout chopped away from the pcb. pushing the power limits has consequences in cooling and size, and now people are starting to pay for those consequences.
realistically the whole atx format needs a full rework or something brand new.
stick the video card slot on the top edge of the motherboard on a 90deg turn so the gpu pcb runs parallel(rather than perpendicular) to the mb pcb and stick a tower cooler on the gpu. move the m.2 ssd slots to the back of the motherboard. re-align/organize/standardize everything so power cables dont need to be 2ft long "just in case" you have to route something around the long way.
with 3.3 and 5v moving out of psu to the motherboard, manufacturers might as well start trying something new/better.