Flash drive tech...
With various big flash drives on the market, using high-quality RAM chips and ingenious controller chips to maximise useful life, I can see supply of parts getting a bit tight. And, if the stuff I've seen is correct, the big drives can last a long time, just because of the time needed to write 60+ gigabytes a few hundred thousand times.
But this is a small drive, and if the long-life RAM can't be obtained the system could have an embarrassingly short life.
Twice the flash RAM doubles the potential life, if you can maintain the write-cycle limit.
(And the wear-balancing in the controller is why just getting a big SD card might not help.)