Ad Age's 40 Under 40 honorees share how they are using AI to enhance efficiency and creativity, but they also express concerns about overreliance on the technology. While some are amazed by how quickly AI has been adopted and its ability to streamline tasks, others worry that it could erode critical-thinking skills and creativity.

"The access to an always-on brainstorm partner is incredible. But I think there is a real danger in removing too much friction from the process. ... We learn by getting something wrong, figuring out why, and carrying that knowledge into the next thing," says Juliet Tierney, senior VP of cultural strategy, Havas Media