Counter point about general knowledge that is documented/discussed in different spots on the internet.

Today I had to resolve performance problems for some sql server statement. Been doing it years, know the regular pitfalls, sometimes have to find "right" words to explain to customer why X is bad and such.

I described the issue to GPT5.2, gave the query, the execution plan and asked for help.

It was spot on, high quality responses and actionable items and explanations on why this or that is bad, how to improve it and why particularly sql may have generated such a query plan. I could instantly validate the response given my experience in the field. I even answered with some parts of chatgpt on how well it explained. However I did mention that to customer and I did tell them I approve the answer.

Asked high quality question and receive a high quality answer. And I am happy that I found out about an sql server flag where I can influence particular decision. But the suggestion was not limited to that, there were multiple points given that would help.