> If the latter — trust me, the same is true of eMMC, or any other Flash media ordered in bulk quantities. You just have to QA them on arrival. Set up an RMAed-parts box with a shipping label in advance; you’ll need it.

SD cards and USB flash drives are manufactured with lower-grade flash memory than SATA and NVMe SSDs. The stuff that wears out in RPi usage is the stuff that was rejected for desktop usage. So having a large failure rate is not the only option, if you can expose a SATA or PCIe port. It's a little disappointing that they cannot even offer end users that upgrade path.