The difference with this generation is that there is very little room between the 3080 and 3090 in order to slot another card in there. There's what 15% between them? Why would anyone pay £1,000 for a 3080ti when the 3080 is £350 cheaper for a 5-10% drop in performance?
Traditionally, the 3080ti (if it even exists, and I'm not convinced) would match the 3090 and render it obsolete. But that usually happens a minimum of 6 months after initial release not 6 weeks.
When you see how close the 3080 and 3090 are it indicates to me that the top tier has been squeezed to it's limits and it's the mid range that had still to show it's hand i.e. 3050, 3060 etc..