Wait, you're mixing 2 things together there. Read disturb != data retention, ERASE is to get rid off the voltage cause by read disturb, but it erases the cell = data loss. The ECC is what is used to recover from a read disturb, and that's what most flash drives won't have.

So:
  • you are right that installing FFXIV on a flash memory will wear the data out, with files becoming corrupted over time, requiring you to rewrite them (wearing out one more cycle of the memory)
  • my argument of playing FFXIV from the flash drive is valid, the chip won't be worn out from read access. The wear starts only if you start re(writing) data on it.
  • according to the slides, you have 100k reads on each file (10k for MLC) before read disturbance starts showing up