I definitely did not mean using it as a prescription drug for a known condition. I meant using it without any medical indication, like many of us do. We know that amphetamines can lead to cognitive impairment [1] [2]. We know much less about reliance (over-reliance?) on AI, but what we know doesn't look good either [3] [4]. Of course, if you already live with a condition that makes it hard to concentrate, the benefits can outweigh the risks. But for most people they don't.

(Aside wrt being more effective with something than without: this is anecdotal, but my paragliding instructor once said that modern wings are often designed to correct for various pilot errors. He advised against buying those because he had seen people make worse mistakes after getting accustomed to them. In his own words: "you become dumber under a smart wing". Sharing because I think this applies to many things in life.)

[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC3639428/

[2] https://pmc.ncbi.nlm.nih.gov/articles/PMC2670101/

[3] https://www.sciencedirect.com/science/article/pii/S074756322...

[4] https://www.dailycal.org/news/campus/academics/failing-grade...