Unfortunately there's also drift in behavior that comes from retraining. "OK Google, play NPR news headlines" get different results some days than others. Som

Unfortunately there's also drift in behavior that comes from retraining. "OK Google, play NPR news headlines" get different results some days than others. Sometimes I get the latest hourly news, sometimes I get a robot voice reading headlines to me. Sometimes asking to dial someone calls them, sometimes it returns search results. Yadda.