Lots of great insight here. One particular such nugget:

This past year with the iPhone X I’ve had a lot of difficulty with vertical panoramas. I’ve shot so many over and over trying to get everything sharp, but the focus seems to degrade as I continue upward. After talking with Apple engineers, I’ve learned it was not an issue of focus depth but of the accelerometers inside the device and how they are tuned to read your motion.

The iPhone XS fixes this problem. Combined with the new Smart HDR, I’ve shot a bunch of vertical panos that are exposed beautifully and tack sharp from top to bottom. Check out the vertical panos below and note the fixed focusing issue and the insane exposure improvement from iPhone X to iPhone XS.

Smart HDR seems like a big gain for the new camera. This is a terrific post. Keep an eye out for the closeup comparisons between the iPhone X and iPhone XS cameras.