After 27 years, Jeff Dean is leaving Google: His ‘goodbye email’ explains why

Jeff Dean's farewell note to Google runs long, and the most telling part isn't about AI at all. It's a list. Wedged between scaling Google Search's index 100X and starting the TPU program, he mentions biking to offsites in Monterey, a group run called "Run or Else…", changing offices 18 times, and the fact that a Google badge gets you a cappuccino in more than 100 cities. Twenty-seven years, reduced to bullet points he clearly enjoyed writing.The news underneath the nostalgia: Thursday, August 6 is his last day. Dean, chief scientist at Google DeepMind and one of the very few engineers whose work touches nearly every layer of Google's stack, is leaving to co-found Discovery Loop, a public benefit corporation, with Sanjay Ghemawat, Oriol Vinyals and Quoc Le. He joined in 1999, when the company had 25 employees.