For batteries today isn't Tesla really using the Energy division as some kind of buffert for batteries?
As in hey, we need more batteries for cars so no powerwalls/megawalls made this week. I get that it's useful to be able to do that but if they couldn't maybe they'll get around to making more car batteries to begin with (yeah, yeah, I know they are doing their best).
If Energy used totally different batteries they wouldn't be cannibalized so they could start growing faster. Sounds like these Cobalt Free batteries would be suited for that. And it would free up what little they are getting from GF1 at the moment as extra for the cars.