Some people are still looking for source material rather than, say, an imaginary friend summarizing info that may or may not have been made up.

I'm not quite finding that AI search works reliably for my use cases yet.

There's no viable alternative, so yes of course people use search engines.

How do you look something up?

Seems to be a significant number of people who have deemed LLM responses 'good enough' and completely dropped search engines altogether. I would imagine that works fine for people whose queries are simple and/or the accuracy of the result is not actually important. We may be discovering many people just wanted Google to tell them what they want to hear and LLMs are much better at that than scanning a handful of garbage Quora posts.

Not everyone trusts AI to filter their internet queries.