I was in a school team where we had to create documents describing a new curriculum. One of the members thought creating these docs using a LLM was a very easy and productive way of doing it. But it absolutely wasn't. It looked alright at the start, but on closer inspection it was just a load of BS. We had to change literally every single sentence to let the text make sense. I also was in a team that created tools we could use for our students. Again one of the members used a LLM to create certain tools. At first glance they worked alright, until some change was needed. Refactoring wasn't possible - a total rewrite was the only thing that helped. I don't think LLM boosts productivity. At best it boosts the appearance of productivity of one person, and then the others have to clean up after her.