TGIF used to have a number of highly technical and informative main presentations. There was a great one by the self-driving cars team where they showed some of

TGIF used to have a number of highly technical and informative main presentations. There was a great one by the self-driving cars team where they showed some of their tools and explained some of their challenges (great anecdote about why one iteration of the cars was afraid of fixie bicycles). And it wasn't just software - Patrick Pichette did really informative breakdowns of the quarterly earnings results, and the legal team sometimes went into surprising depth on major cases. These were rarely directly useful, but the practice reinforced a sense of curiosity and mutual respect.