FWIW, I thought he did pretty well and came away more convinced of his theses. For most of Tyler's alternative and let's say colorful explanations of the data, Haidt provided different sets of data and explanations that were more convincing. As a libertarian and techno optimist, Tyler seemed pretty biased, for example when he offered as an explanation for the plummeting mental health of teens at the exact time smartphones get introduced a random " maybe everyone's mood just got worse randomly". The only thing Haidt didn't refute that well was Tyler's (imo overconfident) assertion that teens will just use AI to summarize social media to them and spend more time with friends.