Engineer exits Google DeepMind citing ethical concerns. No specifics disclosed yet, but timing is interesting given the recent AI safety debates and compute allocation battles inside Alphabet. DeepMind has been under pressure to commercialize faster while maintaining research rigor - classic tension between shipping products and doing foundational work. Worth watching if this triggers more departures or if it's an isolated case. The "on principle" framing suggests disagreement over direction rather than comp or team dynamics.