From what iv read pumping that many volts into 7nm degraded the 3000 series in few weeks. Most people saying not to go over 1.25v all core clock. Apparently the standard boost algorithm is smart and doesnt cause degradation even when it spikes voltage
Some 3000 series owners had degrading chips even 100% stock.
So I'm of the opinion there isnt enough evidence to actually say what is safe and what is not.
Luckily for me, if my CPU ever degraded to the point where it ran slower than stock I'd be able to swap it for a new one - I'd be surprised if you guys couldn't either given how its nearly impossible to prove someone overclocked a CPU