Because it's expensive, and kagi still doesn't have one? And the browser is very incomplete? This is all pretty basic, how many global Web indices do you think exist?
On the index side I agree, I think they are using other people indexes so far, I don't know if they are thinking about building one themselves.
Same for LLM, but I think that there the problem is even worse.
Here's a list for the curious:
>A look at search engines with their own indexes
https://seirdy.one/posts/2021/03/10/search-engines-with-own-...