Electrical engineering. My mentioned coworkers are competent but more junior in the field. We did a miniature internal study and found the best models provided accurate, relevant information on the first prompt about 90% of the time when asked to explain or verify concepts. The remainder consisted of hallucinations or misunderstood queries.
They struggled with questions that instead required complex problem, providing some mixture of appropriate solutions, overly complex but still functional solutions, and hallucinated shite.
I recommended that we do not move forward with adopting AI in any capacity. While it has some utility for basic information retrieval and fact checking, it still required someone with sufficient knowledge to be able to quickly evaluate the quality of its output. Helpful for someone who knows what they're doing, dangerous 10% if the time for someone who does not. I also highlighted the ethical concerns, many of which my peers were unaware.
Same, we bought one before Musk went mask off. We're closing on 180,000 KM and have only needed to replace the upper control arms, which was covered by warranty.