70
And the real maddening part is that search engines have been so enshitfied to make way for AI that's wrong like 9/10, so you're forced to rely on it for answers because if you try google, the snake wraps around and eats it's own tail giving you an AI answer! 
Anything that is even remotely a novel problem AI can't solve. It doesn't have the training data for your specific problem. At best it'll do a web crawl for you and summarize its findings.
If you want to really pull your hair out take a look at AGENTS.md or SKILLS.md. State of the art agentic coding practices: glorified README.md files. (the ai frequently doesn't bother to read them).
I will say one thing nice about LLMs: they are fairly "human" in the sense that they error in familiar ways. In a way AI is automated human error.