I think using Kagi was the first time I've ever encountered an "instant switch" moment for a product I've been using for over a decade. I never realized just how much useless SEO garbage was being flung in my face using Google until I used Kagi. Of course there's the measurable added productivity of finding what I need faster, but it's also a qualitative difference in that I don't kind myself glossing over half the page avoiding ads and useless links.