I get where you are coming from, but they don't need a 384bit 80-class card if a 256bit gddr7 card matches the 4090's bandwidth, and I don't care if they make the 5090 384 or 512 bit because I'm not buying a 5090, and anyone that is buying a 5090 would likely prefer the 512bit bus. All I want is for them to price the 5080 at $1200 or less, otherwise I'm not buying at release. I got my 3080 for $750 in December 2020. The 4080 two years later was LESS fps/$ than my 3080. If the 5080 ends up being 4090 performance for $1500, it will have equal fps/$ to my four year old 3080, and I will be skipping another generation. At $1200, the increase in value would still suck, but I would hold my nose and buy it. $1k would be a fair price in a rational market with competition, but that's not the world we live in.
On no timeline do I buy a $2k+ 5090 regardless of what Nvidia does to gimp the rest of the product stack's value, and I'm sure the vast majority of the market is like that. For the people that do buy a $2k+ 5090, most of them wouldn't care if the 5080 was being given away for free as long as the 5090 is a significant increase in performance.