Yes, in the car via CarPlay. It makes for safer driving. I just plug my phone in and put it away so I can’t reach it to text and drive. I then ask it to text, look up directions or play whatever song I want.
Here's an example of something that seems obviously should work: I'm driving to pick someone up. Apple maps is navigating. "Hey siri, text <person I'm picking up> my ETA."
Yeah, that doesn't work. The only thing I reliable get out of Siri is setting a timer and opening the camera.