Which will draw even more power from the power hungry GDDR6X,
Which is why Navi 21 only matching it is bull, as rogame said in a comment on that Twitter thread, AMD are trolling AIBs with Navi 22, that's the only card they've been given access to since they know as soon as AIBs get information, it'll leak out. Navi 22 is the one that drops in between the 3070 and 3080, Navi 21 is the one that competes well above that.
In this scenario if AMD isn't giving AIBs something to work with for Navi 21 at this point then we are still a long way from the release of those cards.