The 1080 Ti was $700. I paid $720 for my aftermarket-cooled, factory OC 1080 Ti two years ago! The 2080 is scarcely available for that price, most models are $800, and some are close to $900, for negligible performance improvement. And RTX features which, 5 months after release, are useless.
There's no way to spin that into a positive. Vulkan performance? LOL for the 2-3 games that use Vulkan? If you don't play those games, the 1080 Ti arguably offers more. You can buy a used 1080 Ti for $500 and, given the reliability issues that have been reported with RTX cards, that's a pretty safe path forward.
Honestly I'm shocked that you'd even try to offer a defense of the 2080... at least, although the price is sky-high, the 2080 Ti does offer a significant performance leap over the 1080 Ti. The 2080 offers nothing, literally nothing, for 1080 Ti owners... RTX in BFV is barely playable at 1080p on the card.