GN seems to think it is Asus's fault, possibly due to bad firmware/BIOS

That would be shocking!

There were few reports from non-asus ones IIRC, but it's hard to tell whether that was same "the EXPO profile loaded from memory fried it" or someone just going "MoRe VoLtS BeTtEr" and frying it.

Almost always good to wait on GN. They tend to do a much more thorough and careful analysis of situations like these.

Are they always the first to get the news? No. But they almost always get it right which I appreciate a lot. IE: The 12-pin power debacle.

I like to wait for the inevitable five minute king Linus Tech Tips video where Linus calls the guy at Gamers Nexus “really smart” and just repeats the findings that are somewhere in the hour long GN video. Because I only sorta care a little about this stuff.

Four motherboard makers have come forward and issued press releases about new firmware they are releasing that limits the SoC voltage, thus preventing this issue. What further evidence is needed?

The question is if they limit abnormal voltage, or just lock to "safe" ones. this might not be a solution, this could be just a workaround basically crippling oc

AFAIK none of them said anything about what is happening nor what their fix is doing

That can simply be a preemptive measure to prevent a further user meltdown.