As an aside, one neat side effect of
hey Siri is that often multiple devices can hear you at the same time. In my office I have my XR, iPad, and for dev an iPhone 7 and 8. When I say hey Siri I often hear all of them start to respond, but then all but one cancels listening. I've never really paid attention to which one wins the battle, but it does usually seem to be the device closest to me.
Just thought it was interesting as something they had to accommodate -- multiple devices all phoning home to determine if there's a race, and if so who should field the request.
