This was years ago, and it was a Lucid employee who I am sure is long gone, so take it with a grain of salt. But they said having the efficiency show on the center cockpit panel of the Air is impossible. For hardware reasons. The way the screens are wired, the way the different screens talk to each other, etc. It simply can’t be done. That data cannot get to that screen.
Sounds nuts. But then again, more than a few people who would know have told me the Air’s hardware and the way it’s all wired together is the work of a lunatic, so I would not be totally surprised.
Gravity has the dynamic range right there on the left side. You’d think they would have included it on the Air while they were porting everything else over. So maybe it’s true.