[nottorp]

I was one of those zero people until i realized i can tell Siri "add an appointment with Blahblah next tuesday at 11", it will actually understand that and it takes less time than using the calendar interface.

I'm sure enough people find some small use for the voice commands that it's a good feature to have on the phones.

[bombcar]

Siri really shines with the HomePod or the watch I’ve found.

[Tagbert]

It works well on phones for things like setting calendar events, timers, reminders, playing music.