I wholeheartedly agree. Particularly when you look at power cables used for car audio amplifiers and their routing through tiny spaces. 10 AWG and 8 AWG are pretty common in this scenario.

To me this just feels like (I have zero proof) as if this is all a continuation of previous connectors. The AT mainboard connector already used multiple wires for 5V and ground. The various ATX connectors just seem to continue and extend that…
https://www.playtool.com/pages/psuconnectors/connectors.html

Many (all?) of the lipo connectors out there are polarized and can handle all or nearly all the power required by a 5090.

An XT60 can to 30 amps. Two can feed a whole 5090.

XT90 connectors are rated for 90 amps for applicable voltage range.

Or just wait for USB 7.2 prodigious speed with the USB-E connector. Then you’ll only need 1 connector. But it will still take 3 tries to get the symmetrical plug in the right way.

Exactly, but as your power demand drops which modern ever increasing efficiency makes likely you can potentially drop the 12v.

Honestly I can’t find a single thing I actually like about USB-C or PD that makes me want to choose a device with that port rather than dedicated display, power, ethernet, etc. As I don’t want the device to come with just 2 ports so I have to carry around a million dongles and am SOL when the port you are using for everything and cycling so very very often breaks, or the cable I have happens not to function for this device etc.

The framework laptop is perhaps an example of how USB-C could be useful, but you can do that same concept very very easily even if USB-C doesn’t exist, it is just creating your open source module interface, that probably brings the ubiquitous USB and PCIe lanes in a rather M.2 compatible formfactor being the long established standard that means lots of ready made chips to take the voltages and I/O options already exist.

All of this is a lie, 50 series did not improve efficiency, nor have a significant increase in performance.