> Unfortunately, ... changing the NAND flash, which can have a big performance impact, has become a common but questionable practice in the SSD industry. Now that trend has evolved into a more worrisome pattern: Some smaller SSD manufacturers are now silently changing the SSD controller, too, which has even broader implications.
#SSD storage devices may not contain the specified flash memory chips, may not perform as expected.
The article doesn't mention it, but I would expect that #eMMC storage suffers from the same problem.
#Chia miners / farmers are re-selling their used #SSDs as new. Because Chia involves lots of writes to the underlying flash memory, it can wear SSDs out quickly.