Large language models (LLMs) have been heralded as a boon to collective productivity. McKinsey boldly proclaimed that LLMs and other forms of generative AI could grow corporate profits globally by $4.4 trillion annually, and Nielsen trumpeted a 66% increase in employee productivity through the use of these same tools. Projections like these have made finding ways to use these tools — and turbocharge productivity — a top priority for many companies over the past year. While we are intrigued and impressed by this new technology, we advise cautious experimentation instead of wholesale company-wide adoption.