I didn't said it can't work fine at 12V but we have 2025 just around the corner now and it would be more eco friendly at 24V level with the same power cables.24V would require an entirely different motherboard and PSU design. Not happening. EDI: also 3090ti already did 600w on 12v. it worked fine.
BTW
2 times No - You dont need different mobo or new PSU design - just minor changes in PSU - thats all.