Mossberg: Why does Siri seem so dumb?

Yes, Siri can usually place a call or send a text. It can tell you sports standings, Yelp restaurant reviews and movie times - features Apple added years ago. And it must be said that all of its competitors have their own limitations and also make mistakes.But in its current incarnation, Siri is too limited and unreliable to be an effective weapon for Apple in the coming AI wars. It seems stagnant. Apple didn't become great by just following the data on what customers are doing today. It became great by delighting customers with feats they didn't expect. The AI revolution will demand that.'Stagnant'?Seems to be the default state of Apple's software these days.