But I don't entirely agree on LLMs being useless. An LLM could help with avoiding duplicate questions. It could analyze the content of the question and point out stuff like missing logs before the question is submitted to guide beginners through the basics.
If someone manages to turn an LLM into a good context-aware search engine, that would also make sense for SO.
But somehow no one seems to actually use LLMs given how much bullshit they talk about them.