It may not be much but it is something.
They already run on crude instead of more refined fuel for very small percentage point gains in fuel cost.
5t less fuel over 2 weeks isn't nothing, and this is the first one. With visibly a shit-ton more room for more panels.
If a modern high speed SD card is good enough for 60fps 4k done footage, or whatever they're shooting now, it's probably fast enough for whatever you're doing on your phone.