It is a weird one, there are 1-2 companies running a lot of 13th and 14th gen chips on W680 boards without MCE, etc. who are reporting very high failure rates but they are not entirely unique in what they are doing and there are loads of other companies doing similar stuff who've not said anything, which they almost certainly would have if they were experiencing failures of that magnitude, and others where someone has commented but only seeing a small number of failures.
My instincts are it is individual CPUs where one or more cores are regularly hitting over 1.5v improperly for the current frequency and thermal situation (doesn't necessarily mean high temperatures), likely due to a faulty algorithm, which are the ones which are failing, possibly there was a bad batch of those but it doesn't cleanly cover the situation above unless there are pools of tray CPUs affected and a fragmented number of retail. Also a total unknown at this point how far it goes and/or if every chip is affected and will degrade prematurely or not.
There also seems to be 3 or 4 issues involved - aside from a supposedly limited batch of chips with the via oxidation problem, there seems to be some older chips with a voltage linked instability problem out the box, which Intel tried to address with a microcode update which then seems to have exposed this issue with a different set of chips.
Agreed, i still remember that dodgy 13700K i had that needed absurd amount of voltage to run even close to stock but i cannot say whether that was due to this fault/issue or whether it was a chip that someone had used for extreme overclocking.
The annoyance of all this is trying to find out what the main cause is, if you have one of these broken chips in hand.
The first microcode fix actually made it worse as it just injected more voltage to try and keep those already degrading chips working at stock which in turn caused further and faster degradation.