I had some memory of AltaVista being full of SEO (as I recall it was mostly a keyword search engine) spam.
And that was probably true, but I also came across this Quora page https://www.quora.com/Why-did-Altavista-search-engine-lose-g... and it reminded me about two other things stand out to me as true
1. AltaVista was slow and you needed to know your syntax to find things 2. AltaVista was cluttered. Google had very clean results.
I think on 1 google is still fast, but 2. not so much. Google's results are far from "clean", instead it feels like the main goal is showing you as much ads as possible and preferably getting you to accidentally click on one.
This in and the fact that Kagi results are as good or slightly better (and much more customisable) than Google is probably the main reason I'm so happy with Kagi.
After all, Kagi sources results from Google so it's no surprise the quality is similar https://help.kagi.com/kagi/search-details/search-sources.htm...