I use the assistant daily, often instead of search. The search is good, but the sad fact is searching www has been getting less interesting fast and there simply isn't much of value to find (maybe if they added an option to search in the Wayback Machine? I would pay extra for that!). Adding a LLM on top of search results and to fire off multiple searches makes it possible to sometimes squeeze a little bit of actually useful information out of the cesspool that is modern web.
Without the Assistant I would probably go back down to the lowest kagi tier.