I try to use Siri. The best feature of Apple Carplay is the maps, and it works for me perhaps 1 out of 3 attempts.
First time I ever used it was to find out how much farther to get to the bridge — this on the day I picked up the new car. It referred me to some bridge with a completely different name in Wisconsin. Turned out I was about three miles from the bridge.
I can’t compare Siri with Alexa or the ‘droid option, but Siri’s a joke.
Carplay is fantastic, but I remember when Apple Maps was not great. Now it’s all I use. No more waze, garmin, etc.