What are some subjects that ChatGPT has given only shallow instruction on?

I'll tell you that I recently found it the best resource on the web for teaching me about the 30 Years War. I was reading a collection of primary source documents, and was able to interview ChatGPT about them.

Last week I used it to learn how to create and use Lehmer codes, and its explanation was perfect, and much easier to understand than, for example, Wikipedia.

I ask it about truck repair stuff all the time, and it is also great at that.

I don't think it's great at literary analysis, but for factual stuff it has only ever blown away my expectations at how useful it is.