LLMs can combine cross-domain insights, but the insights they have — that I've seen them have in the models I've used — are around the level of a second year university student.
I would concur with what the abstract says: incredibly valuable (IMO the breadth of easily discoverable knowledge is a huge plus all by itself), but don't put them in charge.
I would concur with what the abstract says: incredibly valuable (IMO the breadth of easily discoverable knowledge is a huge plus all by itself), but don't put them in charge.