When each user can personalize the results themselves, you make SEO completely impractical because they can no longer target a single monolithic algorithm controled by one entity. Websites would actually have to have organic appeal to users, who get the final say to hide away bad sites from the results page (looking at you, Quora, Pinterest, and Fandom).

I am all for Kagi keeping that feature. If for nothing else then to rub it in the face of every googler who have argued that it was impossible.

And if you use it I am happy, that gives Kagi an incentive to keep it around.

I'm just saying that for me the results are so good out of the box that with a couple of exceptions I never had to block anything.