Of course nV is going to try to milk as much as possible from the design, and enthusiasts like us (and miners who need to follow the ever-increasing hash curve) are easy pickings -- it's "Super" distasteful. First, we had cards with extra VRAM (going all the way back to the 7 series), Tis, then Titans, and now Supers -- all with the intent of segmenting the market in fine slices by price tiering, steepening the price curve/lowering price/performance each step, in accordance with surgical launch timing. I expect nV will need to introduce late-gen "Super Dupers" next gen to keep the machine growing. And for those saying "just switch to consoles", consoles aren't even safe from tiering now and will continue to get worse where MSFT and Sony are adopting the same model to capitalize on consumer's volition to always have "the best".
As for a 3090 Super, I don't think that's possible as I think 3090 already uses the totality of Cores and SMs GA102 offers -- unless it's just a speed bump which would be hilarious. I'd more expect the Supers to hit the high-end and mid-range cards where most of the volume can be had (and there's still legroom in those chips) e.g. 3060, 3070, 3080. 3090 likely won't be surpassed until 4000s (which will likely be a more architecturally-efficient Amphere on 5nm).