Pointless to speculate, and really doesn't matter because 3070 will have even greater demand than 3080/3090, as a function of the pricepoint being a lower barrier. Won't matter what numbers Navi launches with (and they'll all be insta sold-out too), 3070 will be hard to buy for months.
Except they don't need to "artificial scarcity" a product that already had insane demand, and hype was already 10/10. There's no business upside, it loses money.
Artificial scarcity is to prop up a middling product that there isn't great confidence in.
Don't underestimate the Halo Effect. Halo products, and a brand developing a reputation for always having Halo products - the best or fastest of something - has an effect that trickles down the entire product stack, and influences buying decisions at every level. It's hard to measure in...
Benchmarks are useless.. for you. I don't care about cinebench and blender, and the claim has been that Zen3 will finally beat Intel in single threaded IPC. So we'll need to let the benchmarks do the talking, not wishful thinking.
3090 vs 3080 isn't merely a difference of memory size, but ultimately not relevant since my response was to your presumption that Nvidia wants 20GB 3080's on the market because they'd be more expensive and that would help them (somehow). It was unclear how you came to the conclusion.
Not sure how you came to this conclusion, but the opposite is true - more expensive to produce, but not more profitable. Reselling a higher quantity of expensive GDDR6x modules per card isn't where Nvidia makes their margin.