I think the title should be “what is one thing you think iOS is still lacking” because a lot of the answers have been software related.
For me, I would like to be able to move my apps to wherever on the home screen, I desire. I would also like to be able to move apps in specific folders in the app library.
They hold their resell value quite well compared to android phones
Apple will support the device for 6+ years.
iMessage
AirDrop
Camera Quality