I only use LLMs when I don't know what I am looking for. Otherwise, search engines all the way.
LLMs can't be trusted, you have no way to tell between a correct answer and a hallucination. Which means I often end up searching what the LLM told me just to check, and it is often wrong.
Search engines can also lead you to false information, but you have a lot more context. For example, a StackOverflow answer has comments, and often, they point out important nuances and inaccuracies. You can also cross-reference different websites, and gauge how reliable the information is (ex: primary source vs Reddit post). A well trained LLM can do that implicitly, but you have no idea how it did for your particular case.
I use LLM for almost everything from summarizing, finding out terminology in very different fields that I have no knowledge of, initial research of any field, coding (no more google searching of stack overflow anymore), pretty much everything. I use search engine only for searching for companies/products due to some mistrust that it would find all the products or companies including very small companies/products. But I am very open to removing search engines completely if this last point is satisfied.
LLMs can't be trusted, you have no way to tell between a correct answer and a hallucination. Which means I often end up searching what the LLM told me just to check, and it is often wrong.
Search engines can also lead you to false information, but you have a lot more context. For example, a StackOverflow answer has comments, and often, they point out important nuances and inaccuracies. You can also cross-reference different websites, and gauge how reliable the information is (ex: primary source vs Reddit post). A well trained LLM can do that implicitly, but you have no idea how it did for your particular case.