When was Siri ever useful? I have yet to encounter a voice "assistant" that can do more than search Google and set timers reliably, and Siri itself can't even do those very well.
There are definite frustrations, mostly around playing music. Around 5% of the time, Siri will play the wrong album or artist because the artist name sounds like some other album name, or vice versa. I wish, here, that it used my Music playback history to figure out which one I meant