It’s funny that many of us say please. I don’t think it impacts the output, but it also feels wrong without it sometimes.

Depends on the model, but e.g. [1] found many models perform better if you are more polite. Though interestingly being rude can also sometimes improve performance at the cost of higher bias

Intuitively it makes sense. The best sources tend to be either of moderately high politeness (professional language) or 4chan-like (rude, biased but honest)

1: https://arxiv.org/pdf/2402.14531