I've felt that so I'm trying to actively resist this happening (by never relying on an LLM answer: I'm resisting Gell-Mann amnesia concurrently) and I'm seeing cognitive decline happen around me, but I'm not sure it's just LLMs: I've felt less able to focus since I got covid in 2022 which was before LLMs, but even that may be a false attribution because it can also be just age related. I do feel that leaving the bird app helped me in critical thinking, because that lessened my exposure to idiocy, and I haven't scrolled nostr for the same reason for a while either.

It's tough; I'm not sure what to attribute and how to prevent decline. But trying.