Quoted from kermit24:
I don’t think Stern knowingly purchased bad cards. Is that what you think? They bought what they thought were good ones I am sure.
With even a tiny bit of searching, it becomes very clear that Kingston flash memory is just rebranded lowest-price leftover/rejected flash memory from actual manufacturers as Kingston doesn't make flash memory themselves. As a result of that price-focused almost-anything-goes quality control, Kingston has had a fairly long record of failed flash memory quality stretches.
For a manufacturer selling $5500 and up machines, that alone should have disqualified Kingston as a supplier.
EDIT: Kingston bought Imation in 2016, I guess. Not sure if they got flash manufacture through that acquisition, but even if they did, Imation had an inarguably worse rep than Kingston so probably didn't help matters.
Quoted from kermit24:
I don’t think Stern knowingly purchased bad cards. Is that what you think? They bought what they thought were good ones I am sure.
It's been an ongoing spotty problem since the beginning of Spike.