And you know this how? The consumer is spending $2000-$6000 on these GPUs ... you seriously believe mil spec is going to make a difference in what they want to pay?
PC connector specs have to consider the whole PC market starting from entry-level, not only $2000 GPUs.
While the HPWR connector may have gained fame in the high-end market, the connector was intended to provide everything from 75W to 300W too. Two of the "sense" pins are dedicated to identifying the cable as 150W, 300W, 450W or 600W.
A $15 power connector for cables on a $40 PSU or sub-300W GPU would hurt quite a bit.
"likely" ... or none at all ... they had similar problem in other high AMP GPUs not just the 5090 ... the incidents are stacking up and it's NOT looking good for nVidia. Sweeping this under the rug as "user error" isn't going to work this time around ... nor blaming it on PCI-SIG.
When Nvidia is doing its silicon qualification runs, it has hundreds of pre-production cards running in test centers. If melting connectors were a major issues, they would have seen it there first.
There is no "sweeping under the rug" needed here. Melting appears to be mostly an issue for people reusing cables that have been subjected to wear and abuse for years. That is why GN and others have to go to extreme lengths like cutting at least four of the 12V wires to "reproduce" the melting problem.
The only major mistake IMO is not using the "sense" pins for measuring voltage drop from the 12V plane in the PSU to the 12V plane on the GPU, likewise for ground, so the load can throttle itself to keep 12V sag / GND swell under something like 200mV, which would be 10W of losses at 50A with 4 mOhm of end-to-end resistance.
With remote-sense, no shunts required: if half the pins/wires fail or the cable is made from #18 copper-clad aluminum, resistance doubles and maximum current gets halved. If cables or pins get hot, their resistance increases and that also reduces the current limit, a great disincentive against people cable-managing stuff in hot and cramped places.
Low-power PSUs can also manipulate 12V-sense to add virtual resistance, such as by tapping Vsense from the OCP shunt's high-side. That diminishes headroom seen by the GPU by some proportion of total system load and adds the PSU's internal wiring to what counts against the 200mV budget.