the power supply should be connected to high-current parts with wired contacts, or preferably bus bars, in the chassis. there should never be any mandated visible wires between the power supply and computer components. all power connections should be combined with the mounting standard. your GPU shouldn't catch fire because your power supply manufacturer soldered a Molex connector wrong.
no expansion cards should be supported mainly by a slot connector. there should never be any reason to have a "GPU prop" in your case. You shouldn't have to worry about your fucking graphics card sagging because everyone forgot how to make horizontal cases.
server manufacturers achieved much this long ago. pull one of the power supply from any Poweredge and you'll find a high-current edge connector. but ATX is a shoddy, slapdash standard with almost 40 years of technical debt. and we will never be rid of it, because of gamers
EDIT: and also because BTX flopped back in the netburst dark ages
I'm the only person on the world wide web brave enough to say that computers are bad
