Nine years at Google today. I joined in 2017 to work on the Assistant - on models that didn't behave the way deterministic software did. Back then, "non-deterministic" was a niche problem most PMs never had to think about. The weird corner of the building. The weird corner is now the whole building. What I didn't know in 2017 - couldn't have known - is that the instincts I was developing on the Assistant team - designing around model failure, calibrating error rates, building for outputs you…