I'm not sure I would call it "dead". "Generally available" means that I can order one or a dozen today for MSRP or less and get a shipping date between "today"

I'm not sure I would call it "dead". "Generally available" means that I can order one or a dozen today for MSRP or less and get a shipping date between "today" and "end of the week". "In demand" means that I can order one today for a little over MSRP or look around for a sale to get one under, but I might not be able to find a single supplier who wants to sell me a dozen at once. "Speculation bubble" means that I can't find anyone to sell me one at MSRP without going to ridiculous lengths like setting bots out to scoop the competition, and I certainly can't call a distributor to get a dozen at MSRP -- but if I'm willing to pay a high premium, I can buy one today. I think RPi4 is in a speculation bubble.