But compared to using Kagi, I've found found LLMs end up wasting more of my time by returning a superficial survey with frequent oversights and mistakes. At the final tally I've still found it faster to just do it myself.
I will say I do love LLMs for getting a better idea of what to search for, and for picking details out of larger blocks.
Honestly, I think part of the decline of Google Search is because it's trying to increase the amount of AI in search.
Thus, I find LLMs quite useful when trying to find info on niches that are close to a very popular topic, but different in some key way that's hard to express in search terms that won't get ignored.