Not really, and no.
XO-1.5 is no longer in production.
We still apply a similar qualification process to the eMMC chips
soldered into XO-1.75 and XO-4. We take a batch (e.g. 1000), randomly
pick a sample (e.g. 20), test that sample for compatibility, change
firmware if necessary, test for endura
I have been around the block with a 128G micro sdcard allegedly from
Sandisk. I made various attempts at creating two partitions and formatting
them ext4, some of which progressed at the rate of 10G/hour.
I finally used dd to write /dev/zero to the entire device, which took almost
24 hours.
