I honestly think a lot is solved with the new onboarding experience in Mastodon, even though it's controversial in the fediverse.
If the twitter exodus to Mastodon happened today I suspect the main problem, except the servers having to deal with millions of people trying to sign up all at once, would be the lack of quote posts. Which is at least on the roadmap.
Even if AI magically got to the point of providing accurate and good results, I would still profoundly object to using it.
First, it's a waste of resources. The climate impact of AI is enough of a reason why we should leave it dead until we live in a world with limitless energy and water.
Second, I don't trust a computer to select my sources for me. Sometimes you might have to go through a few pages, but with traditional search engines at least you are presented with a variety of sources and you can use your god given ability of critical thinking.