I only use siri to start timers when cooking, do measurement conversions, and some quick math. Sometimes I use it for quick trivial questions like if my wife and I are talking about random stuff and we both don’t know the answer to something. It has been useful just for that.
I used to kinda enjoy using Siri but in the past year or two she got really bad. She raises the volume of music when I ask her to lower it and occasionally she will not stop playing when I ask her to stop
Google assistant was at least usable, but since the enshittification it's been super fucking unreliable. Like "turn the lights on" "OK here's a Spotify Playlist" levels of shit.