It definitely does in my experience. I have intentionally used it for specific tasks for defined periods of time. And then stopped and used only my normal online search tools and a text editor without AI assistance. My projects were written concept development, plus some light coding to create utility scripts.

From just my own experience there is definitely a real cognitive hazard associated with using LLMs at all, for all but the most specialized tasks where an LLM is really warranted.

The scripts worked fine, as they were quite simple python utilities for some data cleaning, so I see a use there. But I found that the concepts never caught fire in my imagination, whereas usually a good share of concepts developed manually turn into something that gets a deeper treatment, even a prototype design at least.

Does walking change your brain activity?