Just out of curiosity I don't see how 4 sticks die together at the exact same time unless the PSU is/has fucked up hard.
I'd argue that the likelihood of 4 sticks failing together is much lower than the MOBO or CPU or PSU failing in a way that makes RAM inaccessible.
Typically you'd see one stick failing at which point you could take it out and run with the other 3 (or 2 depending on configuration).
Anyway if you ever intend to return its probably best to keep the rest of the components because who knows which of those will be up next for a shortage/crisis.