3080 Ti would be more expensive anyway. The only people it might annoy is 3090 buyers, but those buyers want the best regardless of price and that will still have the most unlocked core and most VRAM.
This. A 3080Ti would make my decision easier. I'm not someone who upgrades every generation, I like cards to last, so even if 10GB is fine now, it might not be in 3 years time. A 3090 is significantly more expensive and overkill on VRAM, so the Scottish in me comes out...I keep changing my mind every day on which card to get. Either will be a leap from my 1080 but a 2GB VRAM upgrade after skipping a gen feels a bit stingy.
That said, I completely understand people's point about upgrading the 3080 in a couple of years and that still be cheaper than a 3090...assuming no insane generational price hike.