Both cameras, on one screen.
The selfie feed and the rear feed, side by side, the moment the device on the other end connects. This is the FaceTime camera, opened from here.
The saved shots are already there for you.
Past camera captures load with the live view, so the history is just one tap away, not a separate search.
You begin with a number or an email.
Nothing to install on your side. Enter one detail and the viewer opens to the device you named.